Complete story — includes the ending
Clarke and Lexa encounter a gigantic mutated gorilla after one of the grounder council members drives Clarke into the forest with the intent to kill her. They escape it but become temporarily trapped in its cage and Lexa is injured. Clarke figures out a way to escape and has an idea about freeing the grounders inside Mount Weather to act as an insider army. Bellamy and Lincoln plan their infiltration of Mount Weather en route to the reaper tunnels but upon arrival Lincoln is overcome by his addiction, leaving Bellamy to a questionable fate. Murphy helps Jaha confront his past, while Jaha persuades Murphy that the Sky People have nothing to offer him and that his best option is to search for the mystical "City of Light". Jaha then leaves the camp with over a dozen Ark survivors, with Murphy tagging along, to search for the "City of Light". After witnessing Octavia's determination and unwavering spirit to fight, Indra offers to make Octavia her second in command but Kane warns Octavia that once the war ends it is likely that the grounders and Sky People will end up breaking their alliance.
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