Plot summary
Two days after the massacre, Raven discovers that Mount Weather has been jamming communications which caused the crash of the Exodus drop ship. Leaving camp to investigate, Bellamy and Octavia discover that Lincoln has become a reaper. Clarke still has not spoken to Finn. Raven manages to listen in on Mount Weather's radio broadcasts and discovers that the acid fog from before is a weapon of the mountain. In Mount Weather, Wallace wants Jasper to find volunteers to provide blood for the mountain residents but he fails. Maya discovers the radiation leak she was caught in was no accident and confides in Jasper about the mountain's caged grounders.
In captivity, Jaha and Kane are told that one of them must kill the other to gain an audience with the Commander. Kane attempts to take his own life rather than kill Jaha but a grounder witness, named Lexa, reveals herself to be the Commander and says that she believes their wish for peace is sincere. She sends Jaha to Camp Jaha with a message; leave within two days, or die.
Credits
Adapted from Wikipedia contributors, List of The 100 episodes. HTML formatting and reference markers removed.