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 .
As the dropship enters the atmosphere, communication with the Ark is lost. Two prisoners die when they unbuckle their seatbelts during the rocky descent. Watch the-100-s01e01 1
Leadership tension arises immediately. Clarke Griffin focuses on survival and reaching Mount Weather, while Bellamy Blake encourages the group to remove their monitoring wristbands to make the Ark believe they are dead, ensuring the adults don't follow them down. Watch the-100-s01e01 1
A pragmatic leader and the daughter of the Ark’s chief medical officer. Watch the-100-s01e01 1
A "spacewalk bandit" and daredevil who quickly forms a bond with Clarke.