A pragmatic leader and the daughter of the Ark’s chief medical officer.

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

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

Back in space, Chancellor Jaha survives an assassination attempt by Bellamy. Abigail Griffin (Clarke's mother) narrowly avoids execution for using restricted medical supplies to save him.

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 .

A stowaway who joined the mission to protect his younger sister, Octavia.

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.

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 May 2026

A pragmatic leader and the daughter of the Ark’s chief medical officer.

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

A "spacewalk bandit" and daredevil who quickly forms a bond with Clarke. Watch the-100-s01e01 1

Back in space, Chancellor Jaha survives an assassination attempt by Bellamy. Abigail Griffin (Clarke's mother) narrowly avoids execution for using restricted medical supplies to save him.

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 . A pragmatic leader and the daughter of the

A stowaway who joined the mission to protect his younger sister, Octavia.

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. Back in space, Chancellor Jaha survives an assassination

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