The 100 is an American post-apocalyptic science fiction drama television series developed by Jason Rothenberg, which premiered on March 19, 2014, on The CW.[1][2][3][4] It is loosely based on a 2013 book of the same name, the first in a book series by Kass Morgan.[5] The series follows a group of teens as they become the first people from a space habitat to return to Earth after a devastating nuclear apocalypse. During the course of the series, 100 episodes of The 100 aired over seven seasons, between March 19, 2014, and September 30, 2020.