Cowboy Bebop: The Movie, known in Japan as Cowboy Bebop: Knockin' on Heaven's Door (Japanese: カウボーイビバップ 天国の扉, Hepburn: Kaubōi Bibappu: Tengoku no Tobira, lit. Cowboy Bebop: Heaven's Door), is a 2001 Japanese animated science fiction film based on the 1998 anime series Cowboy Bebop created by Hajime Yatate. Multiple staff from the original series worked on the film, including director Shinichirō Watanabe, writer Keiko Nobumoto, character designer/animation director Toshihiro Kawamoto, and composer Yoko Kanno. The original Japanese and English voice cast also reprised their roles.
Cowboy Bebop: The Movie is set between episodes 22 and 23 of the original series. The plot centers on a mysterious terrorist planning to destroy the human population on Mars using an unknown pathogen. The bounty hunter crew of the spaceship Bebop work to find the terrorist and discover the source of the pathogen before the attack can take place.