The cast of a cancelled sci-fi series are reduced to a life of conventions and public appearances, only to find themselves transported into space for real. Naive aliens have mistaken the show for real life and want the actors to help defend them from an evil extraterrestrial warlord. Sci-fi comedy, starring Tim Allen, Sigourney Weaver, Alan Rickman and Sam Rockwell.

For four years, the courageous crew of the NSEA Protector — Commander Peter Quincy Taggart, Lieutenant Tawny Madison, and Doctor Lazarus — set off on a thrilling and often dangerous mission in space ... until their series was cancelled! Now, twenty years later, aliens under attack have mistaken the Galaxy Quest television transmissions for "historical documents" and beam up the crew of has-been actors to save the universe. With no script, no director, and no clue, the actors must turn in the performances of their lives.