List of The 100 episodes

The 100 (pronounced The Hundred ^[1]) is an American post-apocalyptic drama television series. It premiered on March 19, 2014, on The CW.^[2][3][4][5] The TV series, developed by Jason Rothenberg, is loosely based on a 2013 book of the same name, the first in a trilogy by Kass Morgan.^[6]

On March 11, 2016, the series was renewed for a fourth season of 13 episodes, which is set to premiere on February 1, 2017.^[7][8][9] As of May 19, 2016, 45 episodes of The 100 have aired, concluding the third season.

Series overview

Season		Episodes		Originally aired		Nielsen ratings
				First aired	Last aired	Rank	Viewers (millions)
	1	13		March 19, 2014	June 11, 2014	150	2.59[10]
	2	16		October 22, 2014	March 11, 2015	157	2.46[11]
	3	16		January 21, 2016	May 19, 2016	165	1.94[12]

Episodes

Season 1 (2014)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
1	1	"Pilot"	Bharat Nalluri	Jason Rothenberg	March 19, 2014	296843	2.73[13]
Set in an indeterminate year in the distant future, 97 years after a nuclear apocalypse has devastated the surface of Earth, the only remaining humans are residents of a flotilla of orbiting space stations known as "The Ark". Equipped with vitals-monitoring wristbands and instructions to proceed directly to Mount Weather, upon landing, 100 juvenile delinquents are sent to the surface to test its habitability. Among them is 17-year-old Clarke Griffin (Eliza Taylor), the daughter of The Ark's chief medical officer, Dr. Abby (Paige Turco). The 100 discover a lush Earth filled with new wonders and dangers. Clarke and four others search for the former Mount Weather Emergency Operations Center, a possible site of supplies. Ultimately, they discover that there are hostile survivors on the ground when Jasper, one of their party, is apparently mortally attacked. The other delinquents remain at the landing site and, under the leadership of Bellamy (Bob Morley), celebrate their new world. Back on The Ark, Chancellor Jaha (Isaiah Washington) has been shot, causing the merciless and unsympathetic Councilman Kane (Henry Ian Cusick) to take charge.
2	2	"Earth Skills"	Dean White	Jason Rothenberg	March 26, 2014	2J7052	2.27[14]
Chancellor Jaha recovers and learns of his son Wells' supposed fate. Abby recruits Raven, a zero-gravity mechanic, to fix a drop pod to send herself to the ground. Meanwhile on Earth, Clarke, Wells, Murphy, and Bellamy set out to rescue Jasper, who was taken by the Grounders after being attacked. They find Jasper tied to a tree and manage to return to camp with him, in addition to a panther they killed prior his rescue. Bellamy forces the 100 to trade their wristbands for food. Clarke manages to keep hers. As the Ark watches more wristbands going offline, a figure watches the 100 from above the camp.
3	3	"Earth Kills"	Dean White	Elizabeth Craft & Sarah Fain	April 2, 2014	2J7053	1.90[15]
In flashbacks, Clarke's engineer father Jake discovers a life support problem with The Ark, and is arrested and "floated" by Jaha. In the present, Clarke, Finn, and Wells search for antibiotic seaweed to treat Jasper's wounds. Bellamy assembles a hunting group who are followed by Charlotte, a troubled 13-year-old. A lethal acidic fog hits, forcing Clarke, Finn, and Wells to seek shelter. The three talk, and Clarke berates Wells for his apparent part in her father's execution. Bellamy and Charlotte take refuge from the fog; he comforts her when she has a nightmare. Clarke discovers her mother's culpability in Jake's death, and she and Wells reconcile. Later, Charlotte's misinterpretation of Bellamy's advice leads her to kill Wells.
4	4	"Murphy's Law"	P. J. Pesce	T. J. Brady & Rasheed Newson	April 9, 2014	2J7054	1.69[16]
Monty attempts to use the wristbands to contact The Ark. Octavia and Jasper discover Murphy's knife outside the wall with two fingers, which are Wells'. Clarke publicly accuses Murphy, inciting a mob that begins hanging him. However, Charlotte confesses, and Murphy is cut down. Charlotte flees camp with Clarke and Finn, and takes refuge in a bunker, pursued by a furious Murphy. Feeling guilty, Charlotte attempts to turn herself in, but Bellamy intercepts her. The whole group ends up at a dead-end cliff where Charlotte ultimately commits suicide, and Bellamy banishes Murphy. Monty accidentally fries all of the wristbands. Finn runs to the bunker in frustration, Clarke follows, and they have sex. On The Ark, Abby and Raven go to great lengths to acquire a pressure regulator, but Kane finds out and has Abby arrested. Raven launches off The Ark and prepares to enter the atmosphere.
5	5	"Twilight's Last Gleaming"	Milan Cheylov	Bruce Miller	April 16, 2014	2J7055	1.80[17]
Raven, unconscious, has made it to the ground. Bellamy reaches her pod first and throws away her radio. Clarke and Finn follow, and help Raven, who is revealed to be Finn's girlfriend. They catch up with Bellamy and tell him of the 300 people to be culled from The Ark to preserve oxygen. He helps locate the radio, but it cannot be repaired in time, so they devise a plan to fire "flare" rockets that The Ark will see, confirming that Earth is survivable. On The Ark, the approved plan calls for sealing off and deoxygenating Section 17. A desperate Abby reveals Jake's discovery to The Ark, causing some residents to volunteer for the culling. After the culling, Abby, imprisoned, and Jaha watch in surprise as the "flare" rockets appear in the viewport above Abby's cell. Meanwhile, Octavia is captured by a Grounder.
6	6	"His Sister's Keeper"	Wayne Rose	Tracy Bellomo & Dorothy Fortenberry	April 23, 2014	2J7056	1.97[18]
In flashbacks, Bellamy witnesses Octavia's birth; he names her after Augustus' sister Octavia the Younger. Due to The Ark's one child rule, Octavia is forced to live beneath the floor of her family's quarters. To ensure her daughter's safety, her mother resorts to prostitution in order to gain notice of guard's inspections. When Octavia is 16, Bellamy takes her to a masked ball for Unity Day; she is caught, and their mother is executed. A year later, Commander Shumway convinces Bellamy to assassinate Jaha, in exchange for a place on the dropship. In the present, Bellamy combs the camp looking for Octavia, to no avail. He assembles a search party, and they leave for the woods. Meanwhile, Clarke and Raven travel to Finn's bunker in hopes of finding a radio transmitter with which to contact The Ark, and Raven discovers Finn's involvement with Clarke. Bellamy, Finn, and Jasper rescue Octavia, and Finn is stabbed in the process.
7	7	"Contents Under Pressure"	John Showalter	Akela Cooper & Kira Snyder	April 30, 2014	2J7057	1.88[19]
In the midst of a hurricane on the ground, Finn is near death from a poisoned stab wound. Bellamy, having captured the Grounder who stabbed Finn, tortures him for the antidote. Raven successfully connects with The Ark; Abby assists Clarke with treating Finn. Octavia convinces the Grounder to reveal the antidote by poisoning herself. On The Ark, Abby is released but is removed from the Council. Replacing her is the former chancellor, Diana Sydney, whose intentions are questionable. After learning that Earth is habitable, The Ark begins preparations for Project Exodus: their re-colonization of Earth. However, their drop ships can only carry about 25% of The Ark's population. In addition, residual tension from the culling causes mistrust in the Council.
8	8	"Day Trip"	Matt Barber	Story by : Andrei Haq Teleplay by : Elizabeth Craft & Sarah Fain	May 7, 2014	2J7058	1.64[20]
Video connection is established with The Ark. The Ark informs the 100 of a nearby underground depot that may serve as a winter home. Bellamy and Clarke investigate, and discover a stockpile of weapons and supplies. Dax, whom Commander Shumway is coercing to kill Bellamy, follows them. Octavia takes advantage of the camp's suffering from the effects of an hallucinogenic nut gathered as rations and frees the Grounder, whose name is Lincoln. Bellamy, also hallucinating, is wracked with guilt for the culling and almost killed by Dax. Now, coming to terms with his actions, he speaks to Jaha and is pardoned in exchange for information about the assassination attempt. This leads to the arrest and imprisonment of Shumway. He is visited by Diana Sydney, and it is revealed that Jaha's assassination was her idea. Diana then has Shumway killed in his cell.
9	9	"Unity Day"	John Behring	Kim Shumway & Kira Snyder	May 14, 2014	2J7059	1.73[21]
"Unity Day" arrives, when the joining of the orbiting space stations is celebrated. As the 100 celebrate, they find their video link interrupted when a bomb explodes during the ceremony on The Ark. Diana engineers a mutiny in order to hijack the first dropship. As the ship launches, it is not fully disconnected from The Ark's main systems, causing an Ark-wide power outage and disabling every dropship. On the ground, in an effort to initiate peace, Finn arranges a meeting with the local Grounder leader through Lincoln. Clarke represents the group and goes to the meeting, where she meets Anya, a Grounder leader. Jasper, who along with Bellamy is monitoring the meeting from cover, believes he sees the Grounder spotters in the trees about to shoot, he opens fire, and the meeting dissolves into battle. That night, Clarke and Bellamy see the dropship descending. It comes in too fast with no parachute, and violently crashes in the distance.
10	10	"I Am Become Death"	Omar Madha	T. J. Brady & Rasheed Newson	May 21, 2014	2J7060	1.46[22]
Murphy returns to the dropship after being captured and tortured by the Grounders for information about the group. Soon, a deadly virus spreads thanks to Murphy, who was used by the Grounders as an agent of biological warfare. Octavia learns from Lincoln that this is his people's way of softening the battlefield. To waylay the incoming attack, Raven builds a bomb to stop the Grounders from crossing the bridge featured in the previous episode. Bellamy tasks Jasper with detonating the bomb, and he does so just as the raiding party reaches the bridge. Later, Murphy smothers Connor as revenge for his part in Murphy's hanging.
11	11	"The Calm"	Mairzee Almas	Bruce Miller	May 28, 2014	2J7061	1.71[23]
After a fire destroys most of the food supply, the group sends out hunting parties to restock. Clarke, Finn, and Myles go out together, but Clarke and Finn are captured and brought to the Grounder camp. Anya instructs Clarke to save Tris, her second, a young girl who was injured in the bomb blast. Clarke struggles to save her but is unsuccessful. In revenge, Finn is taken away to be executed. Clarke escapes by killing her guard and runs. Bellamy, Raven, Octavia, and Monty search for the missing party and find Myles, hurt in the woods. Monty mysteriously disappears after hearing a strange signal on their hand radios. Kane awakens on a devastated Ark. He searches for survivors and realizes Jaha is alive in the Earth Monitoring Station and trying to bring systems online. With over half The Ark's populace likely dead, they discover that there are survivors in an access bay to the exodus ship. Kane braves the extreme heat in a maintenance tunnel to reach the survivors—including Abby.
12	12	"We Are Grounders – Part I"	Dean White	Tracy Bellmo & Akela Cooper	June 4, 2014	2J7062	1.58[24]
Clarke is recaptured by Anya, and they encounter a Grounder named Tristan, who assumes command. Clarke is saved by Lincoln and taken to a very much alive Finn. Lincoln leads the two through a network of tunnels occupied by the Reapers, cannibalistic humanoids the Grounders themselves are afraid of. Back at the dropship, Murphy has taken Jasper hostage. Bellamy trades himself for Jasper. While Raven attempts to open the dropship door, Murphy prepares to hang Bellamy. She's successful as Bellamy is dangling, and Murphy retreats to the upper level. Murphy blows a hole in the ship with gunpowder and escapes with a radio. A returned Clarke convinces the group to flee the camp for the ocean. On The Ark, with the dropships no longer functional, Jaha realizes the only way to save the rest of the citizens is by bringing The Ark and its people to the ground.
13	13	"We Are Grounders – Part II"	Dean White	Jason Rothenberg	June 11, 2014	2J7063	1.68[25]
The 100 are ambushed by Grounder scouts and forced to retreat to camp. Meanwhile, the remaining citizens of The Ark prepare to return to Earth. After a technical failure to jettison requires manual intervention, Jaha remains on The Ark. The Mecha Station, with Abby and Kane, makes it to the ground. Back at the dropship, Tristan leads the Grounders' attack. The delinquents mount their defense. Octavia is injured and leaves with Lincoln. Most of the 100 retreat into the dropship; Anya leaps in after them. As previously planned, Jasper manages to activate its rockets, and the massive fireball kills all 300 of the Grounders, and apparently Finn and Bellamy. When the 100 emerge from the dropship, gas grenades drop at their feet, and they all pass out. Clarke wakes up in a white room. Through the window in her door she sees Monty locked in an identical room across the hallway. A sign next to his door reads "Mount Weather Quarantine Ward".

Season 2 (2014–15)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
14	1	"The 48"	Dean White	Jason Rothenberg	October 22, 2014	3J5251	1.54[26]
Finding Monty gone from his cell, Clarke breaks out and discovers she is trapped in an underground complex inside Mount Weather. She discovers an entire population of humans has survived but is unable to go outside because they have never built up the resistance to radiation that the Grounders and the 100 possess. After meeting their President Dante Wallace, she is invited to stay along with the 47 surviving teenagers out of the original 100 that landed on Earth. Distrusting him, she makes a break for freedom but is stopped by Jasper. Clarke secretly plots an escape. Meanwhile, Grounders capture Finn and Bellamy, before Abby, Kane, and the rest of The Ark's survivors find them and free them. After heading to the crash site, they discover Raven and Murphy. Bellamy attacks Murphy, and Kane arrests him. The group returns to the newly established Camp Jaha. Separated from everyone else, Lincoln tries to save a poisoned Octavia, but with no antidote, he is forced to take her to his village, knowing it may mean certain death if he is caught.
15	2	"Inclement Weather"	John F. Showalter	Michael Angeli	October 29, 2014	3J5252	1.48[27]
Chancellor Jaha discovers a baby left on The Ark and plans to take him to Earth. While a suspicious Clarke confronts Dante, Octavia is healed by Nyko, a friend of Lincoln's. Octavia holds Nyko hostage and leverages him to Indra, the village leader, in order to get Lincoln back. Abby performs surgery on Raven to remove the bullet from her spine. Jaha learns that the baby is an hallucination of his son, who convinces him to continue living his life; he crash lands a missile to Earth. During the prisoner exchange, Octavia is attacked by the Reapers, who capture Lincoln. Clarke learns that Anya — the leader of the Grounders — is being held in Mount Weather with other prisoners being forced to supply blood to heal the mountain residents.
16	3	"Reapercussions"	Dean White	Aaron Ginsburg & Wade McIntyre	November 5, 2014	3J5253	1.68[28]
Clarke and Anya escape Mount Weather into the Reaper tunnels. Abby is punished for helping Finn, and Bellamy and the others leave Camp Jaha to search for their friends. Octavia joins Indra's hunting party in order to follow the Reapers and retrieve Lincoln, but he is not among the Grounders they intercept. In Mount Weather, Jasper and Monty worry about Clarke's whereabouts. Kane goes after Finn, Bellamy, and the others, and appoints Abby chancellor in his absence. Clarke and Anya risk their lives to escape the tunnels; Anya takes Clarke hostage. Lincoln is shown to be in Mount Weather, and it is revealed that the Reapers work with the Mountain Men, bringing prisoners to Mount Weather and being fed with dead Grounders.
17	4	"Many Happy Returns"	P. J. Pesce	Kim Shumway	November 12, 2014	3J5254	1.75[29]
Chancellor Jaha is found in a desert and rescued by a boy named Zoran, living with his parents who left their people in search of a place called the "City of Light". Searching for their friends, Finn, Bellamy, and the others find a survivor from The Ark — Mel — who is saved by Bellamy after Sterling dies while trying to rescue her. While Clarke and Anya are on the run from agents who follow them, Raven starts working in the camp again alongside Wick, who has made her a brace for her leg. Octavia finally reunites with Bellamy and the others. Chancellor Jaha is forced to leave Zoran and his parents when Zoran's father trades him for a horse. On their way out of the woods, Clarke and Anya arrive at Camp Jaha. Ark soldiers shoot and kill Anya and knock out Clarke, after mistaking her for a hostile Grounder.
18	5	"Human Trials"	Ed Fraiman	Charlie Craig	November 19, 2014	3J5255	1.64[30]
Clarke is brought into Camp Jaha, and after receiving medical attention from Abby is reunited with Bellamy, Octavia, and Raven. They go after Finn and Murphy. Kane is hoping to find peace with the Grounders but instead is imprisoned at the Grounder camp, where he discovers Jaha is also a prisoner. Meanwhile, Lincoln is being held at Mount Weather where he is the subject of experimentation involving a red drug. Jasper takes extreme measures to save Maya from radiation exposure by allowing a blood transfusion conducted by Dr. Tsing. After Maya's successful treatment, Dr. Tsing and Cage – Dante's son and Lincoln's torturer – ask President Wallace for permission to move forward with trials on the 47. He refuses. Elsewhere, Finn holds an entire Grounder village hostage while searching for Clarke. Clarke, Bellamy, and Octavia arrive in time to watch Finn gun down 18 Grounders.
19	6	"Fog of War"	Steven DePaul	Kira Snyder	December 3, 2014	3J5256	1.86[31]
Two days after the massacre, Raven discovers that Mount Weather has jammed communications. Leaving camp to investigate, Bellamy and Octavia discover that Lincoln has become a Reaper. Raven manages to listen in on Mount Weather's radio broadcasts and discovers the previously encountered acid fog is a weapon of the mountain. In Mount Weather, Wallace wants Jasper to find volunteers to provide blood for the mountain residents, but he is unsuccessful. Maya discovers the radiation leak she was caught in was no accident and confides in Jasper about the mountain's caged Grounders. In captivity, Jaha and Kane are told that one of them must kill the other to gain an audience with the Commander. Kane attempts to take his own life rather than kill Jaha, but a Grounder witness, Lexa, reveals herself to be the Commander and says that she believes their wish for peace is sincere. She sends Jaha to Camp Jaha with a message; leave within two days, or die.
20	7	"Long Into an Abyss"	Antonio Negret	James Thorpe	December 10, 2014	3J5257	1.62[32]
With the Grounders' deadline imminent, Abby and Jaha disagree over what the survivors are to do; Jaha wishes to evacuate to the so called "City of Light", while Abby wants to remain behind to rescue the 47. Clarke, Octavia, and Bellamy hold the Reaper-state Lincoln in the dropship, and learn he was drugged and experimented on. Lincoln's heart stops but is restarted by Clarke, who believes there is a way to cure Reapers – information they can leverage to the Grounders. When Abby is successful in curing Lincoln, Lexa grants Clarke the truce but demands Finn's execution before it can begin. In Mount Weather, Jasper, Monty, Miller, and Harper discover that there are Ark survivors on the ground. Dr. Tsing learns that for the mountain residents to live on the surface, they would have to kill the 47 for their bone marrow. Though Wallace vetoes the plan, his son Cage goes behind his back and begins the process with Harper.
21	8	"Spacewalker"	John F. Showalter	Bruce Miller	December 17, 2014	3J5258	1.40[33]
Clarke returns to camp with knowledge of the only way the Grounders will accept a truce. Opinions are divided when Clarke reveals the Grounders will cease their attack if they are given Finn. Flashbacks to The Ark reveal that Finn was imprisoned because he took the fall for Raven's illegal spacewalking. At Camp Jaha, Abby and a returned Kane think they can bargain with the Grounders by offering to put Finn on trial, but such plans are for naught, as Finn ultimately turns himself in. In a last-ditch effort to save Finn, Clarke goes to meet with Lexa. When Lexa refuses clemency Clarke asks to say goodbye. She approaches Finn, kisses him, and tells him that she loves him while stabbing him in the heart, saving him the brutal execution of Grounder custom.
22	9	"Remember Me"	Omar Madha	Dorothy Fortenberry	January 21, 2015	3J5259	1.48[34]
Clarke and a group from The Ark accompany Finn's body to a Grounder camp to complete their agreement for a truce. Clarke is haunted by visions of Finn. Bellamy tries to convince Clarke to let him go to Mount Weather as a inside man; she refuses. At the village, Finn's corpse is burned along with those of the massacre victims. Kane gifts Lexa a bottle of liquor, which when tested appears poisoned, leading to the belief it was an assassination attempt by the Sky People. The Grounders accuse and prepare to execute Raven, but Clarke and Bellamy pinpoint Gustus, Lexa's right hand, as the true culprit. Later, Clarke changes her mind and sends Bellamy, along with Lincoln, to infiltrate Mount Weather.
23	10	"Survival of the Fittest"	Dean White	Akela Cooper	January 28, 2015	3J5260	1.53[35]
Clarke and Lexa encounter a gigantic mutated gorilla after one of the Grounder council members drives Clarke into the forest with the intent to kill her. They escape it but become temporarily trapped in its cage, and Lexa is injured. Clarke figures out a way to escape and has an idea about freeing the Grounders inside Mount Weather to act as an insider army. Bellamy and Lincoln plan their infiltration of Mount Weather en route to the Reaper tunnels, but upon arrival Lincoln is overcome by his addiction, leaving Bellamy to a questionable fate. Murphy helps Jaha confront his past, while Jaha persuades Murphy that the Sky People have nothing to offer him that his best option is to search for the mystical 'City of Light'. After witnessing Octavia's determination and unwavering spirit to fight, Indra offers to make Octavia her second, but Kane warns Octavia that once the war ends it is likely that the Grounders and Sky People will end up breaking their alliance.
24	11	"Coup de Grace"	P. J. Pesce	Charlie Craig	February 4, 2015	3J5261	1.51[36]
Bellamy is caged in Mount Weather along with numerous Grounders. Jasper's search for Monty and Harper remains fruitless, so he confronts the President about their disappearance. Cage sends snipers to assassinate Clarke and Lexa; they are intercepted, and one is captured for questioning. Maya discovers Bellamy being harvested for blood and saves him; he makes contact with Clarke. President Wallace and Jasper discover Dr. Tsing's illegal experiments on Harper and Monty. Cage replaces his father as President by force and orders a lockdown for the surviving 47 teens. Realizing she has to draw attention to the outside for Bellamy's sake, Clarke sends Emerson, their captive, back to Mount Weather with a message boasting that the army that is coming for them.
25	12	"Rubicon"	Mairzee Almas	Aaron Ginsburg & Wade McIntyre	February 11, 2015	3J5262	1.36[37]
An unmasked Cage rescues Emerson on the surface, revealing the success of the bone marrow experiments. In the dormitory, Jasper tells the others of Bellamy's presence. Jaha and his group encounter a strange woman, Emori, who offers to serve as guide. In Mount Weather, Bellamy seeks a way to help his friends. When Bellamy makes radio contact, Clarke and Raven overhear Cage's plan to bomb the planned peace conference in Tondc. Clarke races to the village, where she explains the danger to Lexa. Lexa convinces Clarke that an evacuation would expose Bellamy's presence in the mountain; the two secretly escape. As they leave, Clarke sees her mother arrive in the village and returns to try to rescue Abby as the missile hits the village.
26	13	"Resurrection"	Dean White	Bruce Miller	February 18, 2015	3J5263	1.42[38]
Clarke and Abby survive the missile strike on Tondc, but Abby is horrified to realize that Clarke knew it was coming and did not evacuate the village. She goes back to help survivors, while Lexa and Clarke set off to find and kill the spotter who called in the strike. Lincoln saves Indra's life, while Octavia leads the other seconds in an effort to dig out survivors. Abby finds Kane pinned below rubble and struggles to free him, while they wonder whether they deserve to survive at all. Clarke finds and kills the spotter with Lincoln's help, and realizes that the spotter's lack of a hazmat suit means the Mountain Men have started harvesting her friends. Inside Mount Weather, Jasper and the others fight back and find refuge with those in Mount Weather who do not agree with Cage.
27	14	"Bodyguard of Lies"	Uta Briesewitz	Kim Shumway	February 25, 2015	3J5264	1.55[39]
Octavia has figured out that Clarke and Lexa knew about the missile, and Lexa decides she needs to be killed to protect that secret. Clarke prevents this and angrily confronts Lexa, who reveals that she has feelings for Clarke. Bellamy, Raven, and Wick find a way to disable the acid fog. Raven and Wick have celebratory sex, but Bellamy discovers that the fog's still active and that his radio contact has been cut off. Lexa and Clarke kiss, but the latter is not ready for a relationship. Raven signals the fog is disabled; Clarke and Lexa lead their army to the mountain. The Mountain Men prepare to deploy the acid fog, but Bellamy manages to elude a security team and destroy the system in an explosion just in time.
28	15	"Blood Must Have Blood, Part One"	Omar Madha	Aaron Ginsburg & Wade McIntyre	March 4, 2015	3J5265	1.49[40]
Bellamy is letting the Grounders imprisoned inside Mount Weather out of their cages as Cage starts to raid the complex for the 47. Some of them are temporarily captured but freed again by Bellamy, Jasper, and Maya, who bring them to the harvest chamber. Soldiers soon raid the harvest chamber too, taking the 47 prisoner once again. Meanwhile, Cage visits his father, desperately hoping he will tell him a way to stop the incoming attack. Raven and Wick destroy the mountain's generators, and the lock on Mount Weather's door is disabled. When they pull the door open however, Lexa commands her people to stand down – she has made a deal with Emerson, her people will be freed if the Grounder army retreats. It is later learned that this was Dante's suggestion. When the Grounders retreat, almost all the Sky People accept defeat and soon leave too, leaving behind only Clarke at the front door and Octavia in the tunnels.
29	16	"Blood Must Have Blood, Part Two"	Dean White	Jason Rothenberg	March 11, 2015	3J5266	1.34[41]
Clarke joins Octavia in the tunnels and is let into Mount Weather by Bellamy. With the 47 waiting for bone marrow extraction, Clarke and Bellamy take Dante hostage. When Cage still refuses to stop, Clarke shoots his father, which leads Cage to begin bone marrow extraction on Abby. Seeing no other option, Clarke has Monty hack into Mount Weather's air filtration system, and she and Bellamy irradiate the mountain, eradicating the population, including Maya. Cage escapes but comes upon Lincoln, who injects Cage with the Reaper drug, killing him, leaving Emerson, who also escaped, as the last Mountain Man. Everyone returns to Camp Jaha, but Clarke, wracked with guilt, leaves. Meanwhile, Jaha and Murphy arrive at an island where they separate. Murphy finds a lighthouse inside of which he watches a recording of the previous occupant who says she "got the launch codes", before shooting himself. Jaha finds a well kept mansion, surrounded by drones, where he meets an A.I., named "A.L.I.E.", in the form of an attractive dark-haired woman wearing a red dress, who thanks him for his "gift": the nuclear warhead from the missile he used to land on Earth.

Season 3 (2016)

No. overall	No. in season	Title	Directed by	Written by	Original air date	Prod. code	U.S. viewers (millions)
30	1	"Wanheda: Part One"	Dean White	Jason Rothenberg	January 21, 2016	3J5751	1.88[42]
For three months, Clarke has been living on her own in the woods. At a Grounder trading post, Clarke sleeps with the post owner, Niylah, and is caught by a bounty hunter while leaving the next morning. At Camp Jaha, renamed Arkadia, Lincoln – unable to leave camp due to a kill order put on him by Lexa – tries to fit in with the Sky People, much to Octavia's distaste. Bellamy, with several others, goes on patrol and encounters Ice Nation scouts. Jasper is injured, and part of the group returns to Arkadia. The rest meet up with Kane and Indra, from whom they learn there is a bounty on Clarke. They leave to search for Clarke, but the Rover ATV they are using gets trapped by a deliberately felled tree. Meanwhile, Murphy is released from his bunker and finds Jaha and A.L.I.E at the mansion. Murphy refuses to be a part of Jaha's mission but decides to leave the island with him when he sees that Emori is part of the boat crew.
31	2	"Wanheda: Part Two"	Mairzee Almas	Aaron Ginsburg & Wade McIntyre	January 28, 2016	3J5752	1.63[43]
The attackers of the Rover ATV turn out to be fellow Ark members from Farm Station who landed separately, including Monty's mother. Conflicts with the Ice Nation, in whose territory they landed, have reduced their numbers to 63. They accept Kane's offer to come to Arkadia. Part of the group continues their search for Clarke, but after Bellamy is injured by the bounty hunter who has captured Clarke, the group is forced to return to base. Indra returns to the Grounder city of Polis where the bounty hunter – revealed to be Prince Roan of Ice Nation – delivers Clarke to Lexa. Meanwhile, Jaha continues his mission for A.L.I.E. While Otan distracts Jaha, Emori and (unwittingly) Murphy kill Gideon and steal a backpack containing A.L.I.E.'s portable nuclear powered hardware. When Otan returns he appears to be brainwashed, and Murphy throws the pack into the water. Emori and Murphy escape on the boat, while Jaha and Otan scramble to save the bag. A.L.I.E. reveals that no one can die in the City of Light, showing them Gideon - alive and unscarred - in the city.
32	3	"Ye Who Enter Here"	Antonio Negret	Kim Shumway	February 4, 2016	3J5753	1.57[44]
Lexa reveals to Clarke that she intends to initiate the Sky People into her Coalition. Meanwhile, Bellamy, his girlfriend Gina, Octavia, and Raven arrive at Mount Weather with supplies for the Farm Station refugees. There, Echo, the Grounder Bellamy first freed from the cages beneath the mountain, appears and speaks of an Ice Nation plot to attack the summit in Polis. Bellamy, Pike, and Octavia leave for Polis. As they reach the summit, it is revealed there is no imminent threat to those present; the "warning" was a ruse to lure them away. Meanwhile, an assassin infiltrates Mount Weather, kills Gina, and punches in the self-destruct codes. After a fight between the assassin on one hand, and Sinclair and Raven on the other, Mount Weather detonates, killing all 36 members of the Farm Station; only Raven and Sinclair survive. It is revealed that Echo is working with Queen Nia of the Ice Nation, who is helped by Emerson, the last survivor of Mount Weather, in carrying out its destruction.
33	4	"Watch the Thrones"	Ed Fraiman	Dorothy Fortenberry	February 11, 2016	3J5754	1.32[45]
In a fight to the death for the right to the throne, Queen Nia chooses her son Roan to fight Lexa. At Arkadia, Bellamy, wracked with guilt, resigns from the guard. Monty and Jasper leave camp, and Monty confronts his grieving friend. Pike publicly confronts Kane and Abby, questioning them about the Grounder army surrounding Arkadia, sent as protection by Lexa. Pike convinces Bellamy to supply him with guns and help massacre the Grounder army. Lincoln, Abby, and Kane stop them at the last minute. Pike's name is then suggested to be included on the ballot for the upcoming Chancellor vote. Back at Polis, Lexa bests Roan but kills Nia instead of him, and pronounces Roan the king of Ice Nation. Back at Arkadia, Pike is the elected Chancellor. Pike then frees himself, his supporters, and Bellamy, and they leave to finish what they started.
34	5	"Hakeldama"	Tim Scanlan	Charlie Craig	February 18, 2016	3J5755	1.36[46]
Clarke, Lexa, and other Grounders from Polis discover the fallen army of Grounders, slain by Pike and his followers. Indra is found wounded and claims Bellamy persuaded Pike to let her live in order to tell Lexa that the Sky People reject the newly-formed coalition. Lexa allows Clarke's return to Arkadia to tell Bellamy and the others to step down. Clarke fails to convince Bellamy, but instead induces Lexa to end the cycle of violence in hopes of peace. Meanwhile, Murphy and Emori set up traps to steal from passersby. Murphy is caught, and one of the Grounders spots the pill Jaha gave him earlier in the season; he demands to know where Murphy found it. After arriving in Arkadia, Jaha and A.L.I.E. set out to recruit more people into the City of Light by giving out the pills. Devastated by her chronic agony, Raven decides to take the pill, which successfully removes her pain. She then sees A.L.I.E. for the first time.
35	6	"Bitter Harvest"	Dean White	Kira Snyder	February 25, 2016	3J5756	1.41[47]
When Roan has Emerson, the last Mountain Man, delivered to Polis, Clarke must decide his fate. Ultimately, she decides to let Lexa banish him. Octavia and Kane find out Pike intends to clear a nearby Grounder village and utilize their fertile soil for crops, so Octavia rides to alert the village. The village set a deadly trap for the incoming Sky People, which Octavia manages to warn Bellamy about just in time. Abby confiscates the City of Light chips from Jaha when it becomes clear he has no recollection of his son. A.L.I.E. enlists Raven's help to search The Ark for her second iteration, A.L.I.E. 2.0. They are unable to find it, which leads to the realization that it may be on the mythical 13th station, named Polaris, that got shot out of orbit before joining the rest of The Ark. Titus tortures Murphy for information, alongside an escape pod with two letters clearly scorched off from re-entry that, with the other marked letters, spells Polaris.
36	7	"Thirteen"	Dean White	Javier Grillo-Marxuach	March 3, 2016	3J5757	1.39[48]
Murphy convinces Titus to tell him more about the origin of his religion, speculating that the first Commander was from the 13th station rather than born on the ground. Flashbacks reveal that after A.L.I.E. causes the nuclear apocalypse, Becca – A.L.I.E.'s creator and avatar template – attempted to create A.L.I.E. 2.0 to interface more directly with humanity. When The Ark destroyed her research station Polaris, Becca injected herself with an unknown black substance while implanting the ALIE 2.0 in her neck, and traveled to Earth in an escape pod. In the present, Clarke and Lexa prepare to part ways in response to Lexa's decision to blockade Arkadia until Pike is removed from leadership. Before she leaves, Clarke shares an intimate farewell with Lexa when they sleep together. Titus attempts to ensure that the Sky People are destroyed by shooting Clarke and blaming Murphy for it, only he shoots Lexa accidentally. After Lexa dies, it is revealed that ALIE 2.0 has been implanted in the back of her neck; Titus describes it as the spirit of the Commander.
37	8	"Terms and Conditions"	John Showalter	Charlie Craig	March 10, 2016	3J5758	1.20[49]
The Grounders inform Arkadia of the blockade and note that it will only be lifted if Pike is surrendered to them. In response, Pike begins to plan for war, while Kane plans to hand Pike over to the Grounders. To this end, Sinclair allows himself to be arrested. He and an interned Lincoln stage an argument in lock-up, creating a distraction for Kane to capture Pike. Bellamy and other guards intercept him at the gate. Meanwhile, Raven convinces Jasper to help her break into Pike's office to recover the confiscated chip manufacturer. Jasper, mentioning Finn, prompts a realisation that Raven has no recollection of him at all, and they leave the device where it is. As Jaha reflects on his future plans, Pike decides to sentence Kane to death for treason, forcing Bellamy and Monty to consider which side they are truly on in the ever-escalating tensions towards war.
38	9	"Stealing Fire"	Uta Briesewitz	Heidi Cole McAdams	March 31, 2016	3J5759	1.23[50]
In Polis, a conclave is held to decide the new Commander, but Ontari, Nia's bodyguard, arrives and murders the other Nightbloods in their sleep, declaring herself the new Commander. Clarke and Murphy steal the A.L.I.E. 2.0 A.I., known to the Grounders as "the Flame", and Titus names Clarke the new Flamekeeper, advising her to take it to Luna, a Nightblood friend of Lincoln's, and make her the new Commander. Titus kills himself to ensure Ontari cannot use him against Clarke, while Ontari, who needs the Grounders to think she has the Flame so they will accept her as Commander, swears Roan and Murphy to secrecy. Meanwhile, Bellamy goes to Octavia for help to save Kane, Lincoln, and Sinclair from execution, but he is captured by Octavia and Indra. Abigail, Octavia, Miller, and Harper stage an elaborate plan to rescue Kane, Lincoln, and Sinclair, with last-minute help from Monty, whose betrayal of Pike is covered up by his mother. When Pike threatens to execute the interned Grounders, Lincoln surrenders to save them, while the others escape Arkadia. A grief-stricken and vengeful Octavia watches from a distance as Pike shoots Lincoln in the head.
39	10	"Fallen"	Matt Barber	Charmaine DeGrate & Javier Grillo-Marxuach	April 7, 2016	3J5760	1.13[51]
Acting as a fake Flamekeeper, Murphy helps Ontari convince the Grounders to submit to her rule; she later forces him to have sex with her. Pike discovers Monty's involvement in the rescue of Kane and Sinclair, forcing him to flee Arkadia. Monty rejoins Kane, Octavia, and a captive Bellamy at the dropship, but Pike's men capture them, and Bellamy offers to lead them to the rest of Kane's insurgents. Instead, he leads them to the Grounder blockade and hands Pike over to them. Meanwhile, ALIE's influence spreads throughout Arkadia, and Raven enlists Abigail and Jasper to help her destroy the neural blocker inside her. ALIE restores Raven's pain and bad memories to torture her into submission, and then takes control of her body and slits her wrists to coerce Abigail to take a neural blocker. Jasper, captured by Jaha's acolytes, escapes to find the whole of Arkadia in ALIE's thrall but manages to escape with an unconscious Raven, encountering Clarke on the way out.
40	11	"Nevermore"	Ed Fraiman	Kim Shumway	April 14, 2016	3J5761	1.08[52]
Clarke and Jasper regroup with Bellamy, Octavia, Monty, and Sinclair. They decide to carry out Raven's original plan to free herself from ALIE's control: by building an electromagnetic pulse device (EMP) from one of The 100's old wristbands and frying the chip inside her. Clarke leads the group to her former lover Niylah, who has one of the salvaged bracelets, but tensions arise when Jasper continues to blame Clarke for Maya's death, while Niylah is embittered by her father's death in Pike's massacre, and Raven/ALIE relentlessly goads Clarke, Bellamy, and Jasper. Monty and Octavia return to the dropship to retrieve additional components for the EMP, but they are attacked by Monty's mother Hannah, now under ALIE's control. Monty fatally shoots his mother to save Octavia, and they return to Niylah's, where they are able to destroy the chip inside Raven using the EMP, after which Clarke cuts out its liquefied remains using Titus' Flamekeeper kit. Raven reveals to the group that the Flame is the only thing that can stop ALIE.
41	12	"Demons"	P. J. Pesce	Justine Juel Gillmer	April 21, 2016	3J5762	1.15[53]
Clarke's group finds Arkadia abandoned, and they retrieve Lincoln's journal, which contains a map leading to Luna's location. A mysterious masked Grounder attacks Miller, Harper, and Bryan before they can reach Arkadia and then targets Clarke's group before Clarke unmasks him, revealing him to be Emerson. He captures Octavia, Jasper, Monty, and Raven, kills Sinclair, and forces Bellamy to surrender by threatening Octavia. Forcing Clarke to watch, Emerson tries to suffocate the rest of the group in the air lock, but Clarke activates the Flame, which kills Emerson as he is not a Nightblood, and saves her friends. Bellamy recovers Lincoln's body, which is cremated along with Sinclair's, after which Clarke, Bellamy, Octavia, and Jasper embark on a journey to the coast to find Luna, while the others remain in Arkadia so Raven and Monty can use the mainframe to hack ALIE. Meanwhile, Emori arrives in Polis and reunites with Murphy, who updates her on the situation with Ontari. Jaha arrives shortly afterward with knowledge of Ontari's deception, revealing that Emori is under ALIE's control. Ontari has Murphy arrested, and Jaha convinces her to take a chip, promising she will become "all-powerful". With Ontari in her thrall, ALIE now has mastery of both the Sky People and the Grounders.
42	13	"Join or Die"	Dean White	Julie Benson & Shawna Benson	April 28, 2016	3J5763	1.27[54]
Flashbacks depict Pike preparing The 100 with an Earth Skills crash-course in the two weeks prior to the events of the pilot episode. Realising the teens were being sent to the ground and failing to persuade Jaha to let him go with them, Pike beats Murphy in front of the class to incite them to fight for their survival. In the present, Kane and Pike arrive in Polis and are taken prisoner by Ontari, who has made it compulsory for Grounders to take the City of Light chips. While incarcerated, Pike is tortured by fellow prisoner Indra in revenge for the massacre of her people, but Murphy convinces her and other captive Grounders to unite against ALIE's followers. Abigail tries to trick Kane into telling her where Clarke is, with Jaha ultimately threatening to kill her in order to coerce Kane into taking the chip. Meanwhile Clarke, Bellamy, Octavia, and Jasper find Luna's village is gone, but they discover a plant which burns green, sending a signal to Luna's people. After being drugged, they awaken aboard a disused oil rig and meet Luna, who refuses to take the Flame.
43	14	"Red Sky at Morning"	P. J. Pesce	Lauren Muir & Kira Snyder	May 5, 2016	3J5764	1.13[55]
At Arkadia, Harper seduces Monty while Raven hacks into the City of Light. She breaks through the firewalls to get into the Citadel but is blocked by the spirit of Hannah (Monty's mother). Monty erases his mother's code, deleting her from existence, but before Raven can destroy ALIE, ALIE removes herself from Arkadia. Meanwhile, Murphy, Indra, and Pike escape the Polis dungeons and destroy ALIE's core processor, but she has already migrated to the computer system on The Ark, still orbiting Earth. At the oil rig, Clarke plans to implant the Flame into Luna against her will, but Luna and the Boat People overpower her. Some of Luna's people return from the mainland having been taken over by ALIE, and they capture Jasper and Luna, while Clarke, Bellamy, and Octavia are saved by Jasper's new friend Shay as she dies. After breaking free and killing her captors, Luna, knowing Clarke will stop at nothing to get her to accept the Flame, drugs Clarke and her companions, and has them returned to the mainland.
44	15	"Perverse Instantiation – Part One"	Ed Fraiman	Aaron Ginsburg & Wade McIntyre	May 12, 2016	3J5765	1.17[56]
Clarke encounters Roan in the woods, and he agrees to help her infiltrate Polis to implant the Flame into Ontari as a last resort. However, after Clarke, Bellamy, Octavia, Roan, Miller, and Bryan depart Arkadia, Jasper is revealed to have been put under ALIE's control at the oil rig, and he traps Monty and Raven, and takes Harper hostage. At Polis, Roan is shot by Kane and dragged away, while Clarke is captured and tortured by Abigail, who tries to hang herself to coerce Clarke to reveal the Flame's activation phrase. The others are rescued by Murphy, Pike, and Indra. Bellamy and Murphy then attempt to rescue Clarke while the others fight ALIE's acolytes, during which Kane is almost killed in an explosion but is tackled aside by Indra, who is captured. Bellamy and Murphy arrive in time to save Abigail and Clarke, but Jaha prevents them from using Ontari by inflicting a severe head wound that leaves her brain-dead.
45	16	"Perverse Instantiation – Part Two"	Dean White	Jason Rothenberg	May 19, 2016	3J5766	1.29[57]
At Arkadia, Monty rescues Harper and captures Jasper. At the Polis tower, finally freed from ALIE's control, Abigail transfuses the near-dead Ontari's black Nightblood into Clarke so Clarke can be implanted with the Flame. While Pike and the others fend off ALIE's acolytes, Clarke then takes a chip and enters the matrix-world of the City of Light. She is protected by Lexa's spirit and aided by Raven's hacking against ALIE's minions, and is led to a room resembling the Polaris space station, where Becca's spirit shows her the kill switch to destroy ALIE. To stop Clarke, ALIE claims that there is a number of abandoned nuclear power plants around the world that are gradually releasing radiation, and that Earth will be uninhabitable in the next six months, making the City of Light humankind's only escape. Becca insists ALIE is lying. Clarke believes they will somehow survive on Earth, even if it is true, and pulls the switch, destroying ALIE and freeing everyone under her control. In the aftermath, Octavia executes Pike to avenge Lincoln's death.

Ratings

The 100 : Viewers per episode (millions)

Season	Ep. 1	Ep. 2	Ep. 3	Ep. 4	Ep. 5	Ep. 6	Ep. 7	Ep. 8	Ep. 9	Ep. 10	Ep. 11	Ep. 12	Ep. 13	Ep. 14	Ep. 15	Ep. 16
Season 1	2.73	2.27	1.90	1.69	1.80	1.97	1.88	1.64	1.73	1.46	1.71	1.58	1.68	N/A
Season 2	1.54	1.48	1.68	1.75	1.64	1.86	1.62	1.40	1.48	1.53	1.51	1.36	1.42	1.55	1.49	1.34
Season 3	1.88	1.63	1.57	1.32	1.36	1.41	1.39	1.20	1.23	1.13	1.08	1.15	1.27	1.13	1.17	1.29

References

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External links

• Official website
• List of The 100 episodes at the Internet Movie Database