Complete story — includes the ending
In a flashback 236 years ago, humans from Earth found Sanctum on the moon Alpha. A binary solar eclipse occurs, causing the lead scientist to go on a murderous rampage. In the present, the toxins continue to affect Clarke, Bellamy, Echo, Emori, Murphy, Miller, and Jackson. They attempt to chain themselves up to avoid hurting each other, but Clarke, Bellamy, and Murphy end up free. Bellamy ends up trying to kill Clarke and Murphy, but Clarke subdues all three of them with a sleeping gas. A group of the planet's inhabitants steals the group's ship and take control of the mothership. Stuck in the cafeteria, many Wonkru violently attack Octavia for her past actions. Raven wakes Diyoza and they team up with Madi to retake control of the bridge. Afterward, Abby, Diyoza, Raven, Madi, Jordan, Gaia, their prisoner, and a stowaway Octavia arrive on the planet and go to the compound where Raven discovers Shaw is dead. A group of children run up to the crew and think they've come to take them all back home.
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