1. From the Ashes

Complete story — includes the ending

After Octavia's departure, Bellamy is kidnapped by invisible figures while Hope has amnesia. Gabriel, Hope and Echo chase after Bellamy's kidnappers. After experiencing a hallucination of Roan and the real Echo, Echo kills three of them. With the anomaly closing, Gabriel, Echo and Hope choose to follow the others through it to find Bellamy. With the various factions now living together in Sanctum, tensions rise, particularly with the Children of Gabriel demanding Russell's execution while Murphy is guilt-stricken over his role in Abby's death and Madi continues to experience memories from one or more of the Commanders. A depressed and suicidal Russell destroys Priya's mind drive and goads Clarke into killing him; after Clarke knocks Russell unconscious, he is greeted by Sheidheda in the Mindspace who had uploaded himself into Russell's mind drive when the Flame was destroyed. The Dark Commander kills Russell and resurrects himself in Russell's body. Unaware of this, Clarke burns down the Sanctum palace and announces a new beginning for Sanctum and that "Russell" will be executed the next day for his crimes.