Plot summary
Clarke, Lexa, and other grounders from Polis discover the fallen army of grounders, slain by Pike and his followers. Indra is found wounded and claims Bellamy persuaded Pike to let her live in order to tell Lexa that the Sky People reject the newly-formed coalition. Lexa allows Clarke's return to Arkadia to tell Bellamy and the others to step down. Clarke fails to convince Bellamy, but instead induces Lexa to end the cycle of violence in hopes of peace. Murphy and Emori set up traps to steal from passersby. Murphy is caught, and one of the grounders spots the pill Jaha gave him in "Wanheda: Part One"; he demands to know where Murphy found it.
After arriving in Arkadia, Jaha and A.L.I.E. set out to recruit more people into the City of Light by giving out the pills. Devastated by her chronic agony, Raven decides to take the pill, which successfully removes her pain. She then sees A.L.I.E. for the first time.
Credits
Adapted from Wikipedia contributors, List of The 100 episodes. HTML formatting and reference markers removed.