Sanctum becomes a battleground between the devout and the non-believers. The mystery of the anomaly deepens.
A special Naming Day changes everything in Sanctum. Gabriel comes face to face with an old friend.
Bellamy and Octavia must work together to save their friends. Echo is forced to face her past.
Russell seeks justice. Meanwhile, Gabriel must make a difficult choice. Lastly, the Blake siblings reunite.
Bellamy must venture into enemy territory with an unlikely companion. Meanwhile, Octavia is forced to confront her past.
Octavia and Diyoza make their way to the mysterious anomaly in search of the Old Man. Meanwhile, Murphy has an offer for Emori.
Clarke’s past catches up to her.
Diyoza learns more about the mysterious Children of Gabriel while Abby continues searching for a way to save Kane.
Jordan investigates Sanctum. Meanwhile, Octavia and Diyoza discover the threats of the new planet firsthand. Lastly, Bellamy and Clarke butt heads.
Clarke embraces the traditions of Sanctum and tries to make amends for her past actions.