Blue Gender is a 26-episode anime created by Ryōsuke Takahashi broadcast in Japan from 1999-2000. Blue Gender was created by the Japanese animation studio, AIC and is distributed in the United States by Funimation Entertainment. In 2003, Blue Gender was released on American television as part of Cartoon Network's Adult Swim, though it had originally been planned for Toonami, and was thus edited to remove its graphic violence, nudity, and sex scenes. There is also a compilation movie available on DVD with an alternative ending. The series was also shown on the Sci Fi Channel in the UK in 2002-2003. The Blue Gender series is set in the 2030s, in which Earth has been overrun by the Blue, which are mutated insect-like creatures containing a newly evolved B-cell that recently appeared in several humans, including the main protagonist, Yuji Kaido, that kill and harvest humans for food. Most of the surviving human race has moved to Second Earth, a huge spaceship that orbits the planet. The series mostly focuses on Yuji and Marlene's relationship as they work together to reach Second Earth and their participation in military combat operations against the Blue.