6. Memento Mori

Complete story — includes the ending

This episode's plot summary may be too long or excessively detailed. Please help improve it by removing unnecessary details and making it more concise. ( April 2020 ) ( Learn how and when to remove this message ) Murphy teaches Josephine how to act like Clarke. Josephine tricks Abby into resuming the Nightblood program by convincing her to save Kane by turning him into a Nightblood in order to resurrect him in another body. She asks Simone to erase Kaylee's family's mind drives and give some to Murphy and Abby for their cooperation. When Madi starts seeing Sheidheda, the Dark Commander, Gaia performs the Separation Ritual for other Commanders to stop him but it doesn't work. After learning about the Primes, Raven confronts Ryker about it. Octavia's hand begins to age rapidly and it spreads up her arm. Xavier says if it reaches her brain, she'll die. Echo goes on a wild goose chase to search for Bellamy, who is actually locked up. Murphy tries to convince Bellamy not to get revenge on Sanctum for Clarke's death. Bellamy refuses at first but eventually caves in. As they mourn Clarke's death, Sheidheda asks Madi to kill Gaia and get revenge by killing them all but Madi banishes Gaia instead. Outside Sanctum, Xavier helps Diyoza find a cure for Octavia's hand but it doesn't work. When Octavia's hand starts drawing a spiral, Xavier realizes that the temporal flare was a message from the anomaly. He teams up with Diyoza and Octavia to go to the anomaly. After Josephine goes to sleep, Clarke is revealed to still be alive, trapped inside of her own head.