Finn arranges a meeting with Clarke and the leader of the Grounders in order to bring peace, however a sceptical Clarke warns Bellamy, who along with Jasper and Raven follow them to the meeting with weapons. On the Ark, Diana takes over the exodus ship.

Clarke ends up being betrayed by somebody that she trusted. Bellamy, Finn and Murphy attempt to save a stranger.

Lexa and Clarke get into a heated discussion during battle preparations; Bellamy races against time.

Clarke wrestles with a decision. Bellamy learns that something isn't what it seems. Meanwhile, Murphy plots to betray his former Chancellor.

Alie forces Raven’s dark side to come out, and Jasper’s anger continues to grow. Meanwhile, Octavia wrestles with her place in the world, and Monty is forced to make a split second decision.

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.

Clarke’s past catches up to her.

A special Naming Day changes everything in Sanctum. Gabriel comes face to face with an old friend.

Raven faces an unexpected threat. Clarke must keep the peace among opposing factions in Sanctum.

Clarke and Octavia mount a desperate rescue mission as the Disciples close in on what they want.