Complete story — includes the ending
Murphy and Emori, posing as Daniel and Kaylee Prime, manage to rescue their friends from zealots. Working together, the group overpowers the Sanctum citizens under the control of the toxin, saving many although an unknown number kill each other in the conflict. After taking over Eligius IV, Clarke is forced to reveal herself to stop the Primes from mind-wiping Wonkru. Clarke floats all of the Primes but Russell into space, enraging Russell who teams up with the Dark Commander to get revenge. Urged by Clarke, Madi regains control and arrests Russell, now the last surviving Prime. With Madi's life at risk, Raven deletes the Flame, but discovers that the Dark Commander was able to upload himself to an unknown location. In the aftermath, everyone is left wondering if they did the right thing while symbols connected to the anomaly are discovered on Octavia's back. Using the symbols causes the anomaly to expand and Diyoza's adult daughter Hope to emerge. Hope states that "he" has her mother and stabs Octavia before collapsing. Octavia vanishes as the anomaly returns to normal, leaving her fate unknown.
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