Plot summary
Emori dies of her injuries, but Murphy has her mind drive inserted into his own head rather than lose her despite the risks to himself. Clarke kills Cadogan as he begins the test, but fails in her own attempt at it. At the same time, Raven, Nikki and the Eligius prisoners rescue the others from the bunker and the prisoners and Wonkru hold off the Disciples to buy Clarke some time. Raven chooses to take the test herself but the Judge, a transcended being who is taking the form of Abby Griffin, feels that humanity is too violent and deserves extinction.
Sheidheda provokes a battle, resulting in Levitt and Echo being mortally wounded trying to stop it. Indra kills the Dark Commander and Octavia is able to talk both sides down; as a result, humanity passes the test and everyone except for Clarke achieves Transcendence. Clarke returns to Earth with Russell's dog Picasso where the Judge, in the form of Lexa, explains that as she murdered Cadogan during the test, Clarke can never Transcend. However, Clarke's friends, aside from Madi and including Levitt, have chosen to live out their remaining days of existence in human form and settle together in peace on Earth.
Credits
Adapted from Wikipedia contributors, The 100 season 7. HTML formatting and reference markers removed.