Season 4
Survival isn't who you are. It's who you become.
Synopsis
The 100 (2017), Season 4 — 13 episodes — watch online on iFILM. The group defeats A.L.I.E. and finds out immediately that something worse is coming: the reactors inside Mount Weather are failing, and in six months Praimfaya — a second nuclear wave — will sweep the entire planet.
Three options, none clean. Repair the Ark and go back to space. Recreate the Nightblood formula that grants radiation resistance. Or claim the Second Dawn bunker — if anyone can agree on who gets inside. Clarke writes a list of a hundred names. Bellamy runs the last fuel convoy through enemy territory. Octavia enters the conclave to fight for her people's place, where the rules are fair only until they aren't. Each episode shortens the clock by one more notch.
Season 4 strips the show down to a single countdown and nothing else — no side detours, just survival math and hard choices. Tighter than any season before it. Stream The 100 Season 4 all episodes online on iFILM.
13 episodes
S4·E1Echoes
Clarke and her friends struggle with how to proceed after the fate of the world is revealed.
S4·E2Heavy Lies the Crown
The burden of leading weighs heavily upon Clarke and Bellamy when different challenges force them to determine who will live and die.
S4·E3The Four Horsemen
Jaha leads Clarke and Bellamy down a road to possible salvation while tensions rise in Arkadia and Polis.
S4·E4A Lie Guarded
Continued struggles with leadership and trust in Arkadia and Polis take violent turns while Abby leads a team to a distant location hoping to find answers.
S4·E5The Tinder Box
Clarke makes a desperate plea with a former allied force in an attempt to avoid a war and ensure the survival of her people.
S4·E6We Will Rise
Clarke and Roan are forced to work together when they are tasked to deliver a dangerous but crucial asset to Abby through enemy territories.
S4·E7Gimme Shelter
Clarke's arrival on the island quickly takes a turn for the worse. Meanwhile, Bellamy tries to avoid further tragedy in Arkadia.
S4·E8God Complex
After a disappointing discovery, Clarke and Abby question how far they're willing to go. Meanwhile, Jaha finds a lead to the mysterious Second Dawn.
S4·E9DNR
Jasper and Bellamy go on a quest. Meanwhile, Clarke struggles to keep the peace after word of Jaha's discovery spreads.
S4·E10Die All, Die Merrily
Octavia fights in the final battle for her people's survival, but not everyone is willing to play fair.
S4·E11The Other Side
Clarke faces the consequences of her fateful choice.
S4·E12The Chosen
Jaha and Kane disagree over how to handle their grim reality. Meanwhile, Clarke leads a group to save a friend.
S4·E13Praimfaya
It's a race against the end of the world as Praimfaya arrives forcing our heroes to make impossible decisions to ensure their survival.
7 seasons
Starring
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