Complete story — includes the ending
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 ) Ilian, a grounder who was under A.L.I.E.'s influence, kills his family to convince his mother to take the chip but the AI is destroyed before he can be forced to kill himself too. Soon after when his mother dies, she tells him to avenge her. In Polis, Kane and Abby sleep together, while Ambassador Raphael, together with Ilian, plans to challenge Roan. Roan prepares for battle despite being too weak from his injury. Kane and Octavia attempt to deter Raphael, but he refuses. Octavia later assassinates him, making it seem as if Raphael died of natural causes. At Arkadia, Raven, Clarke, Bellamy, Monty, Harper, Bryan, and Miller devise a plan to restore Alpha Station to survive the radiation and acquire a hydro-generator for water from Farm Station which is in the Ice Nation. Grounders meet them there and eventually agree to give them the generator. However, they find many of their own as slaves and vote amongst them to use the generator to make an explosion to free them. The leader of the grounders, Tybe, is the man who murdered Monty's father. Monty then frees the slaves who then beat Tybe to death. Everyone returns to Arkadia but with no way of supplying water for everyone. Clarke tells the people of the radiation crisis and they all agree to work together.
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