Name: Cowboy Bebop: The Movie - Knockin' on Heaven's Door
Genre: Action, Drama, Mystery, Sci-Fi
Released: 2001
Rating: 8.20

Synopsis

As the Cowboy Bebop crew travels the stars, they learn of the largest bounty yet, a huge 300 million Woolongs. Apparently, someone is wielding a hugely powerful chemical weapon, and of course the authorities are at a loss to stop it. The war to take down the most dangerous criminal yet forces the crew to face a true madman, with bare hope to succeed.

(Source: Anime News Network)