Complete story — includes the ending
Clarke's group finds Arkadia abandoned and retrieves Lincoln's journal, which contains a map to Luna's location. A mysterious masked figure attacks Harper, Miller, and his boyfriend Bryan before they can reach Arkadia and then targets Clarke, who unmasks him as Carl Emerson. Emerson kills Sinclair, and traps everyone else in the airlock planning to force Clarke to watch them suffocate. Clarke uses the Flame to kill him and saves her friends. The group holds a funeral for Lincoln and Sinclair, after which Clarke, Bellamy, Octavia, and Jasper embark on a journey to find Luna, while the others remain to use Arkadia's mainframe to hack A.L.I.E. Emori arrives in Polis and reunites with Murphy. Jaha arrives with knowledge of Ontari's deception, revealing that Emori is under A.L.I.E.'s control. Ontari has Murphy arrested, and Jaha convinces her to take a chip. With Ontari in her thrall, A.L.I.E. now has mastery of both the Sky People and the grounders.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of The 100 episodes. HTML formatting and reference markers removed. · Content license