"Galaxy Quest" is a comedic science fiction film that follows the cast of a once-popular TV show, also called Galaxy Quest. Years after the show ended, the actors struggle with their fading fame until they are unexpectedly contacted by real aliens who believe the show is a documentary. The aliens need their help to save their home planet from a tyrannical warlord. As the actors are thrust into a real intergalactic adventure, they must learn to embrace their roles and work together. The film cleverly blends humor with themes of friendship and redemption, making it a beloved classic among both sci-fi fans and moviegoers alike.