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

Clarke makes a desperate plea with a former allied force in an attempt to avoid a war and ensure the survival of her people.

In the season finale, it’s a race against the end of the world as Praimfaya arrives, forcing our heroes to make impossible choices to ensure their survival.

Liv must eat the brain of her murdered sorority sister in order to gain insight about the crime; one suspect, a professional snowboarder (Ryan Hansen), appears to have a secret; Major comes to Clive with his concerns about a missing boy.

Jack desperately tries to find Amy in Seattle but her movements offer more questions than answers; Madison finds herself in a train station with a ticket to Seattle, an envelope of cash, and a mysterious key. An act of humanity has serious consequences for Richard.

Gary reveals a strange link between his former client and Amy. But just as Jack and Gary start to put the pieces together, their only reliable source is brutally murdered. Meanwhile, Madison arrives in Seattle and threatens an old acquaintance. Richard attempts to conceal his secret continues while handling rising pressure from Rose.

The Beauchamp witches have trouble remembering what happened after the portal opened. Victor helps Joanna fight argentum poisoning. Ingrid begins sleepwalking. Freya has visions of Killian in danger.