Season Four Episode Guide

Echoes

Episode #: 401
Air Date: 02.01.17
Our Rating:

Skaikru and the Grounders alike struggle to recover after Alie's control is broken, leaving many wounded -- and Clarke bearing the terrible secret about the future of the planet. As Abby attempts to save the king's life, Ice Nation makes a move for control of Polis.

Heavy Lies the Crown

Episode #: 402
Air Date: 02.08.17
Our Rating:

As Sky Crew search for a way to save everyone from the impending radiation, King Roan plans for a challenge by a rival Grounder. Jasper finds a new lease on what's left of his life, and Bellamy leads a trip to Farm Station to recover a desperately needed machine -- only to find that the crashed station is not unoccupied.

The Four Horseman

Episode #: 403
Air Date: 02.15.17
Our Rating:

Arkadia takes in Grounders already affected by radiation sickness, forcing Clarke and the others to consider a new plan from Jaha -- or watch hundreds die. Roan turns to Octavia and Indra for help when the Flame is stolen, and Murphy returns to Arkadia.

A Lie Guarded

Episode #: 404
Air Date: 02.22.17
Our Rating:

Abby leads a team to Alie's laboratory to try and learn the secret of Night Blood, but get more than they bargained for from an automated defense system. Kane is caught in the middle when Roan decides Skaikru is working against him, and Jasper makes a discovery.

The Tinder Box

Episode #: 405
Air Date: 03.01.17
Our Rating:

As Octavia fights for her life Arkadia is forced to prepare for an Ice Nation assault, and Clarke rides out to entreat with Roan for peace. Abby's attempts to create Night Blood inside Becca's laboratory is complicated when Raven has a seizure, leading to a startling discovery.

We Will Rise

Episode #: 406
Air Date: 03.15.17
Our Rating:

Clark and Roan face a difficult road through Grounder territory to deliver much-needed fuel, while Raven struggles to learn how to land the orbiter in one piece. Arkadia struggles to suppress a lust for revenge directed against the man who destroyed their lifeboat.

Gimme Shelter

Episode #: 407
Air Date: 03.22.17

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

God Complex

Episode #: 408
Air Date: 03.29.17

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. (The CW)

DNR

Episode #: 409
Air Date: 04.26.17

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

Die All, Die Merrily

Episode #: 410
Air Date: 05.03.17

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

The Other Side

Episode #: 411
Air Date: 05.10.17

Clarke faces the consequences of her fateful choice. (The CW)

The Chosen

Episode #: 412
Air Date: 05.17.17

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

Praimfaya

Episode #: 413
Air Date: 05.24.17

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