4. Hesperides

This episode's plot summary may be too long or excessively detailed. Please help improve it by removing unnecessary details and making it more concise. ( September 2020 ) ( Learn how and when to remove this message ) A few months after the kidnapping of Octavia and Diyoza, a Disciple prisoner named Dev arrives on Skyring, forming a bond with Hope. They plot to ambush the Disciples when they return in ten years in order to go through the anomaly to rescue Octavia and Diyoza. However, the plan goes wrong and Dev is killed, forcing Hope to continue on alone.

In the present, Gabriel, Echo, and Hope are forced to wait for the Disciples' return; they learn that the Disciples believe that there will be a last war and that they worship Eligius III as a deity that saved them from the Earth's destruction. The Disciple prisoner Orlando trains them, allowing them to successfully ambush the Disciples five years later, but Echo refuses to trust Orlando further and abandons him on Skyring, and Orlando subsequently commits suicide. On Sanctum, Raven, haunted by the deaths that she caused, studies the armor of a Disciple that Echo had killed, learning that the anomaly is a wormhole.

The Disciples demand Clarke's surrender, claiming that she holds the key to winning the last war. Raven rescues her friends using the Disciple armor and leads Clarke, Jordan, Niylah and Miller through the anomaly in order to find their missing friends; Gaia remains behind but is ambushed by a surviving Disciple who deactivates the anomaly stone and drags Gaia through with him. Clarke and the others arrive on Nakara, an ice planet, with no sign of an anomaly stone to enable them to leave.