New and old threats test the loyalties of the survivors, push them past their limits, and make them question what it truly means to be human.
The Ark survivors establish a new colony on the surface, and everything that the 100 thought they knew about Earth is turned upside-down with the discovery of a secret colony -- which has its own agenda.
A group of 100 young prisoners are sent from an orbiting colony to the surface of Earth to determine if the planet is inhabitable.
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IN PRODUCTION. Season Four of The 100 premieres Wednesday, February 1 (9/8c) on The CW, with 13 episodes.
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