“Wanheda: Part 1” is episode one of season three of The 100.
The 100 (pronounced “the hundred”) is a television series based on a series of young adult books by Kass Morgan. The series is set 97 years after a nuclear war has devastated the Earth. There were a number of survivors in orbit on board various orbital stations belonging to different countries. These survivors combined the space stations into one large construction called The Ark.