When does The 100 return?

The 100 premiered on March 19, 2014, on The CW, and ended on September 30, 2020. The series is loosely based on the young adult novel series by Kass Morgan. The 100 follows post-apocalyptic survivors from a space habitat, the Ark. The first people sent to Earth are a group of juvenile delinquents who encounter descendants of survivors of the nuclear disaster on the ground.