Galaxy Quest is a 1999 comedy film directed by Dean Parisot; starring Tim Allen, Sigourney Weaver, Alan Rickman, Sam Rockwell, Daryl Mitchell, Tony Shalhoub and Justin Long in his feature-film debut. The original music score was composed by David Newman.
The movie is about the washed-up stars of a fictional 1978–1982 TV series called Galaxy Quest (a parody of the television series Star Trek). On the show, the actors played the crew of a spaceship, the NSEA Protector.
Eighteen years after their sci-fi adventure show "Galaxy Quest" was canceled, actors Jason Nesmith, Gwen DeMarco, Alexander Dane, Tommy Webber, and Fred Kwan are making appearances at sci-fi conventions and store openings in costume and character. They're wallowing in despair and at each other's throats until aliens known as Thermians arrive and, having mistaken the show for fact and consequently modeling their entire culture around it, take them into space to save them from the genocidal General Sarris and his armada. Written by Jeff Cross
