#1 - Pilot
Season 1 - Episode 1
Ninety-seven years ago, nuclear Armageddon decimated planet Earth, destroying civilization. The only survivors were the 400 inhabitants of 12 international space stations that were in orbit at the time. Three generations have been born in space, the survivors now number 4,000, and resources are running out on their dying "Ark." Among the 100 young exiles are Clarke, the bright teenage daughter of the Ark’s chief medical officer; the daredevil Finn; the brother/sister duo of Bellamy and Octavia, whose illegal sibling status has always led them to flaunt the rules, the lighthearted Jasper and the resourceful Monty. Technologically blind to what’s happening on the planet below them, the Ark’s leaders — Clarke’s widowed mother, Abby; Chancellor Jaha; and his shadowy second in command, Kane — are faced with difficult decisions about life, death and the continued existence of the human race.
#2 - We Are Grounders (2) 8.38
Season 1 - Episode 13
Clarke pleads with Bellamy to do the right thing as conflict on the ground comes to a head. Bellamy forces Octavia to make a difficult decision. Raven and Jasper work against time and Finn makes a bold move. Meanwhile, the situation on the Ark comes to a stunning conclusion.
#3 - Perverse Instantiation (2) 8.15
Season 3 - Episode 16
Our heroes begin to face the reality of their tragic situation. Everyone prepares for a final showdown.
#4 - Spacewalker 8.11
Season 2 - Episode 8
Clarke returns to Camp Jaha with devastating news. Finn struggles with the aftermath of his actions. Abby gathers information from an unlikely source and prepares for a fight. Meanwhile, flashbacks reveal Finn and Raven’s relationship on the Ark.
#5 - Bodyguard of Lies 8.01
Season 2 - Episode 14
While preparing for battle, Clarke and Lexa have a heated discussion. Desperate for help, Raven has Wick summoned to the engineering room. Jaha and Murphy encounter a perilous roadblock. Meanwhile, at Mount Weather, Bellamy is in a race against time.
#6 - Perverse Instantiation (1) 8.00
Season 3 - Episode 15
Clarke finds hope in the most unlikely place. Alie’s master plan comes together.
#7 - Long Into an Abyss 7.96
Season 2 - Episode 7
As Abby and Jaha each try to establish their authority, Clarke comes up with a plan to stop the Grounders' attack. At Mount Weather, Jasper, Monty, Miller and Harper plan their escape, as Dr. Tsing and Cage conduct deadly experiments.
#8 - Thirteen 7.95
Season 3 - Episode 7
Lexa tries to maintain peace and order within the clans. Clarke uncovers a strange and game-changing truth. A flashback takes us into the darker chapter of humanity’s past.
#9 - Blood Must Have Blood (1) 7.95
Season 2 - Episode 15
Clarke and Lexa prepare for battle, while Raven and Wick experience a major setback. Meanwhile, Octavia and Lincoln are each forced to make a difficult decision. At Mount Weather, Jasper and Maya witness a horrible act, Bellamy follows through on a promise and Cage goes public with powerful information.
#10 - We Are Grounders (1) 7.94
Season 1 - Episode 12
Clarke and Finn escape one dangerous situation only to find themselves faced with a new enemy. Bellamy makes a heroic move to save Jasper. Raven faces a new danger, and Murphy finally gets his revenge. Meanwhile, those remaining on the Ark are coming to terms with the inevitable.
#11 - Inclement Weather 7.91
Season 2 - Episode 2
A suspicious Clarke confronts President Dante Wallace and demands answers. Kane interrogates one of The 100, and Abby performs emergency surgery. Meanwhile, Octavia resorts to violence to find Lincoln.
#12 - Resurrection 7.90
Season 2 - Episode 13
Clarke begins to question Lexa’s leadership decisions. Abby struggles to help an injured Kane. Indra continues to push Octavia. Meanwhile, at Mount Weather, Jasper steps up into the role of leader, and Cage throws Maya into a life threatening situation.
#13 - The 48 7.90
Season 2 - Episode 1
Clarke is still alone in the white room, frantically trying to make sense of her bizarre surroundings, while the fate of Bellamy, Finn and Raven is still unknown. Lincoln and Octavia’s daring plan is thwarted and an enemy returns. Meanwhile, Abby, Kane and the survivors of the Ark must face physical and moral dilemmas in their dangerous and beautiful new world. Finally, Jaha makes a heroic decision.
Season 4 - Episode 10
#15 - Stealing Fire 7.88
Season 3 - Episode 9
Clarke discovers a shocking truth. Octavia is forced to make a decision that could have devastating consequences. Kane and Abby share a moment.
#16 - Blood Must Have Blood (2)
Season 2 - Episode 16
The journey to the City of Light continues, and Jaha makes a move that shocks Murphy. Clarke receives help from an unexpected source, a visitor surprises Octavia, and Lincoln gets his revenge. Meanwhile, at Mount Weather, Cage moves forward with his mission and Bellamy and the group struggle to break free.
#17 - Day Trip
Season 1 - Episode 8
Clarke and Bellamy go on a mission to find supplies for approaching winter. Some of the 100 accidentally eat nuts with powerfully hallucinogenic properties and lose their grasp on reality. Meanwhile, Octavia seizes the opportunity to help a friend escape, and a terrifying event brings Clarke and Bellamy closer. On the Ark, Commander Shumway secretly assigns one of the 100 to kill one of his own, and the treacherous actions of Diane Sydney are revealed.
#18 - Murphy's Law
Season 1 - Episode 4
After the shocking death of one of their own, Clarke and Finn grow closer as they try to figure out a way to communicate with the Ark. Bellamy must keep the group from turning on one another as life on Earth takes a desperate turn. Meanwhile, Abby risks having herself floated in order to give Raven the chance to stow-away in the escape pod bound for Earth.
#19 - Coup de Grâce
Season 2 - Episode 11
Bellamy and Lincoln’s attempt to sneak into Mount Weather has brutal consequences. Abby fights to stay in control as Clarke steps up in her new leadership role. Meanwhile, with Monty and Harper still missing, a desperate Jasper confronts President Wallace and demands answers.
#20 - Earth Kills
Season 1 - Episode 3
In a desperate attempt to treat Jasper’s festering wounds, Clarke, Finn and Wells set out in search of a seaweed antibiotic. Bellamy and his crew go hunting for food, and are joined by Charlotte, a lovable 13-year-old, who feels safe under Bellamy’s protection. A thick, acidic fog appears, forcing Clarke, Finn and Wells to seek shelter inside an ancient van. While they are trapped, Clarke confronts Wells on his betrayal that resulted in her father’s death.
#21 - Demons
Season 3 - Episode 12
Jaha returns to Polis. Murphy has a surprise encounter. Octavia uncovers a clue.
#22 - Human Trials
Season 2 - Episode 5
Kane leads a mission to make peace with the Grounders. Meanwhile, Jasper agrees to participate in a risky experiment, Lincoln enters a world of pain and President Dante Wallace issues a warning. Finally, Finn’s search for Clarke takes a violent turn.
#23 - Nevermore
Season 3 - Episode 11
Alie forces Raven’s dark side to come out. Jasper’s anger continues to grow. Octavia wrestles with her place in the world. Monty is forced to make a split-second decision.
#24 - Wanheda (1)
Season 3 - Episode 1
Three months have passed since the tragedy at Mount Weather and our heroes learn that a bounty has been put on Clarke’s head. Unbeknownst to Clarke, a team led by Bellamy and Kane journeys deep into Grounder territory to save her. Meanwhile, Murphy finds his way to the mansion and discovers a very different Jaha on a very different mission.
#25 - Fallen 7.83
Season 3 - Episode 10
Jaha employs a terrifying new method to convince Abby to join his cause, Kane is on a mission. Bellamy is hit with a hard truth. Monty finds himself in a precarious situation. Jasper rushes to save one of his own.