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While exploring, the teens encounter bioluminescent forests and mutated wildlife, including a two-headed deer. Octavia Blake is attacked by a giant "river monster" while swimming, but is saved by Jasper Jordan .

The episode ends as a small scouting party reaches a river on their way to Mount Weather. Just as they celebrate, Jasper is suddenly speared through the chest by an unseen attacker, revealing they are not alone on Earth. Core Characters Watch the-100-s01e01 1

The group lands off-course, away from their intended destination, Mount Weather , where vital food and supplies are stored. away from their intended destination

A stowaway who joined the mission to protect his younger sister, Octavia. Watch the-100-s01e01 1

A "spacewalk bandit" and daredevil who quickly forms a bond with Clarke.