As Liv and Clive try to track down Cameron and determine his connection to Max Rager, Blaine interrogates Major about the missing brains.

Quentin helps Julia with her search; Eliot attempts to win over his people as Margo tries to keep a devastating secret; Penny and Kady become caught between two magical factions.

Quentin adjusts to his new life; Penny seeks help from an unexpected source; Eliot and Margo contend with the dangers of ruling; Julia and Kady discover another consequence of Reynard’s…

As a dangerous, acidic fog approaches, Clarke, Finn and Wells set out in search of a seaweed-like plant to make an antibiotic poultice for Jasper’s wounds, while a vulnerable young…

Discovering that Jasper may still be alive, Clarke, Bellamy, Finn, Wells and Murphy head out to find him. On the Ark, Abby is determined to prove Earth is habitable, and…