Clarke and Abby question how far they’re willing to go when they make a disappointing discovery; Jaha finds a lead to the Second Dawn.
Clarke’s arrival on the island quickly takes a turn for the worse. Meanwhile, Bellamy tries to avoid further tragedy in Arkadia.
Clarke and Roan are forced to work together when they are tasked to deliver a dangerous but crucial asset to Abby through enemy territories.
Clarke pleads with a former allied force to avoid a war and ensure her people’s survival.
Clarke’s decision on who gets to live causes tension in Arcadia. Jasper loses his sanity when the Black Rain falls. Bellamy and his friends face judgement for their crimes against the Ice Nation.
Jaha leads Clarke and Bellamy on a road to possible salvation, while tensions rise in Arkadia and Polis.
The burden of leading weighs heavily upon Bellamy (Bob Morley) and Clarke (Eliza Taylor) when different challenges force them to determine who will live and die.
In the aftermath of the chaos done by ALLE, Clarke struggles with the decision over telling the world of the impending nuclear apocalypse. The Grounders struggle with each other and Echo uses the chaos as a chance to declare war on the Sky People.