Octavia officially surrenders her leadership, bending the knee to Madi, who takes her place as the true Commander of Wonkru. Guided by the memories of past commanders, Madi leads a successful charge into the valley.

Faced with imminent defeat, the primary antagonist Paxton McCreary launches a nuclear missile, destroying the valley and making Earth permanently uninhabitable.

They are greeted by a new character, Jordan, who is the son of Monty Green and Harper McIntyre.

The episode picks up with a final, desperate struggle for Shallow Valley—the last inhabitable place on Earth.

" Damocles – Part 2 ," the thirteenth and final episode of The 100 's fifth season, serves as a massive turning point for the series, effectively closing the chapter on Earth and launching a new saga.

Video logs reveal that Monty and Harper chose not to go into cryosleep. They spent their entire lives on the ship, raising Jordan and monitoring Earth's recovery. When it became clear Earth was a "lost cause," Monty spent decades cracking the files of the Eligius III mission to find a new, habitable planet.

Once safely in space, the group discovers they lack the resources to survive indefinitely on the ship. They decide to enter cryosleep for ten years, hoping Earth will recover during that time. However, when Clarke and Bellamy are finally woken up, they learn that have passed.

In a tense, nine-minute countdown, the survivors scramble to board the Eligius IV transport ship. Clarke eventually kills McCreary before escaping into orbit with the rest of the survivors. The Heart-Wrenching Twist: Monty and Harper's Legacy