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Season guide

The 100: Season 4

13 episodes Premiered Feb 1, 2017 Updated Sep 22, 2026

The 100 Season 4 continues the overarching saga across 13 episodes. The television and film archival record confirms that the series was created by Jason Rothenberg, produced by companies including Alloy Entertainment, CBS Television Studios, and Warner Bros., and stars cast members such as Eliza Taylor, Bob Morley, Marie Avgeropoulos, and Lindsey Morgan. The narrative follows descendants of post-apocalyptic survivor

Previously on The 100

Season 4 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • The series follows descendants of post-apocalyptic survivors from a space habitat known as the Ark.
  • The survivors return to Earth nearly a century after a nuclear apocalypse.
  • The television series was created by Jason Rothenberg.
  • The cast includes Eliza Taylor, Bob Morley, Marie Avgeropoulos, and Lindsey Morgan.

Season overview

The 100 Season 4 continues the overarching saga across 13 episodes. The television and film archival record confirms that the series was created by Jason Rothenberg, produced by companies including Alloy Entertainment, CBS Television Studios, and Warner Bros., and stars cast members such as Eliza Taylor, Bob Morley, Marie Avgeropoulos, and Lindsey Morgan. The narrative follows descendants of post-apocalyptic survivors from a space habitat, the Ark, who return to Earth nearly a century after a nuclear apocalypse. According to the provided TMDB season synopsis, the fourth season maintains the ongoing saga across its thirteen episodes within this post-apocalyptic science fiction television framework.

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Season 4 Episodes

Episode Guide

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Season 4 Progress Shield

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Binge Efficiency Engine

Season 4: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

31%
69%
Mytharc (4): Crucial lore & season climaxes
Core (9): Character development & subplots
Side Quest (0): Standalone / filler
S4·E1 Mytharc

Echoes

Feb 1, 2017

Clarke and her friends struggle with how to proceed after the fate of the world is revealed.

S4·E2 Core

Heavy Lies the Crown

Feb 8, 2017

The burden of leading weighs heavily upon Clarke and Bellamy when different challenges force them to determine who will live and die.

S4·E3 Core

The Four Horsemen

Feb 15, 2017

Jaha leads Clarke and Bellamy down a road to possible salvation while tensions rise in Arkadia and Polis.

S4·E4 Core

A Lie Guarded

Feb 22, 2017

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·E5 Core

The Tinder Box

Mar 1, 2017

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·E6 Mytharc

We Will Rise

Mar 15, 2017

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·E7 Core

Gimme Shelter

Mar 22, 2017

Clarke's arrival on the island quickly takes a turn for the worse. Meanwhile, Bellamy tries to avoid further tragedy in Arkadia.

S4·E8 Core

God Complex

Mar 29, 2017

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·E9 Core

DNR

Apr 26, 2017

Jasper and Bellamy go on a quest. Meanwhile, Clarke struggles to keep the peace after word of Jaha's discovery spreads.

S4·E10 Core

Die All, Die Merrily

May 3, 2017

Octavia fights in the final battle for her people's survival, but not everyone is willing to play fair.

S4·E11 Core

The Other Side

May 10, 2017

Clarke faces the consequences of her fateful choice.

S4·E12 Mytharc

The Chosen

May 17, 2017

Jaha and Kane disagree over how to handle their grim reality. Meanwhile, Clarke leads a group to save a friend.

S4·E13 Mytharc

Praimfaya

May 24, 2017

It's a race against the end of the world as Praimfaya arrives forcing our heroes to make impossible decisions to ensure their survival.