Season 4 (2017)
The fight to survive has torn The 100 apart, turned them against each other, and taken the lives of their closest friends. Last season, our heroes found themselves at the epicenter of both the Grounder world and the struggle for Arkadia’s soul. Despite their best efforts, war appeared unavoidable, until a new, even more dangerous threat – one that had been quietly rising all along – exploded to the surface: ALIE, the A.I. that ended the world, offered relief from pain and eternal life in the “City of Light.” But as her ranks grew, it quickly became clear that she was building an army dedicated to controlling all sentient life on Earth. This was no longer a battle between warring factions; it was a fight for humanity itself. Now, a hard truth lands on the shoulders of those who remain. Will they go quietly into the night, or will they find hope and faith in each other, as they face their darkest chapter yet?
Air Date: 2017-02-01
Clarke and her friends struggle with how to proceed after the fate of the world is revealed.
Ep.2 Heavy Lies the Crown
Air Date: 2017-02-08
The burden of leading weighs heavily upon Clarke and Bellamy when different challenges force them to determine who will live and die.
Ep.3 The Four Horsemen
Air Date: 2017-02-15
Jaha leads Clarke and Bellamy down a road to possible salvation while tensions rise in Arkadia and Polis.
Ep.4 A Lie Guarded
Air Date: 2017-02-22
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.
Ep.5 The Tinder Box
Air Date: 2017-03-01
Clarke makes a desperate plea with a former allied force in an attempt to avoid a war and ensure the survival of her people.
Ep.6 We Will Rise
Air Date: 2017-03-15
Clarke and Roan are forced to work together when they are tasked to deliver a dangerous but crucial asset to Abby through enemy territories.
Ep.7 Gimme Shelter
Air Date: 2017-03-22
Clarke's arrival on the island quickly takes a turn for the worse. Meanwhile, Bellamy tries to avoid further tragedy in Arkadia.
Ep.8 God Complex
Air Date: 2017-03-29
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.
Air Date: 2017-04-26
Jasper and Bellamy go on a quest. Meanwhile, Clarke struggles to keep the peace after word of Jaha's discovery spreads.
Ep.10 Die All, Die Merrily
Air Date: 2017-05-03
Octavia fights in the final battle for her people's survival, but not everyone is willing to play fair.
Ep.11 The Other Side
Air Date: 2017-05-10
Clarke faces the consequences of her fateful choice.
Ep.12 The Chosen
Air Date: 2017-05-17
Jaha and Kane disagree over how to handle their grim reality. Meanwhile, Clarke leads a group to save a friend.
Air Date: 2017-05-24
It's a race against the end of the world as Praimfaya arrives forcing our heroes to make impossible decisions to ensure their survival.