After bargaining fails and Cage Wallace refuses to stop the bone marrow extraction on the Sky People, Clarke, Bellamy, and Monty flood Level 5 with outside radiation. This act kills over 300 Mountain Men , including innocent civilians and children. Major Character Deaths:

After fleeing, Cage is intercepted in the woods by Lincoln , who injects him with the Reaper drug, effectively killing him as revenge for his torture.

Jaha arrives at a high-tech mansion where he meets A.L.I.E. , an artificial intelligence who reveals she has possession of the nuclear warhead Jaha used to reach Earth.

Despite helping the Sky People, she dies from radiation exposure in Jasper's arms, leading to his long-term depression.