7. The Queen's Gambit

Complete story — includes the ending

On Sanctum, Sheidheda challenges Murphy to a game of chess, revealing that something terrible is about to happen and offering information if Murphy wins. This proves to be a distraction so that Emori won't have Murphy's support in her venture: she organizes a ceremony to reunite the Children of Gabriel with their families. However, Nelson's father attacks him, forcing Nelson to kill him in self-defense. Nelson then joins the Eligius prisoners in taking over the gathering along with the Children of Gabriel and Nikki states that they need to make demands. On Bardo, Gabriel agrees to join the team studying the anomaly stone, while Hope and her mother bond. Echo realizes that the Disciples are trying to recruit them for the coming war and leads her friends in agreeing to join them. Clarke's group arrives on Bardo three months after Echo's group did, and Gabriel reveals Bellamy's apparent death to a devastated Clarke. With Clarke on Bardo, Anders awakens the Shepherd from stasis to announce the Disciples' acquisition of the key. The Shepherd is revealed to be Bill Cadogan, the founder and leader of the Second Dawn doomsday cult.