Galaxy Quest

The cast of the 1980s space-adventure series Galaxy Quest attend fan conventions and make trivial promotional appearances. Jason Nesmith (Tim Allen), a vain former star, thrives on attention, while his co-stars Gwen DeMarco (Sigourney Weaver), Alexander Dane (Alan Rickman), Fred Kwan (Tony Shalhoub), and Guy Fleegman (Sam Rockwell) resent their stalled careers. When aliens from the fictional Thermian civilization mistake them for historical figures, they are transported to a real re-creation of the Galaxy Quest starship, where they must use their wits to save the universe from an enemy threatening their planet. As they navigate this extraordinary situation, the cast discovers that their on-screen adventures have inspired an entire alien society based on the show.