I keep thinking this movie is the one where a robot says “Danger, Will Robinson!” but no, that’s Lost in Space, a movie that came out around the same time and was reportedly terrible, though it was based on a beloved classic television show.
Galaxy Quest is decidedly not terrible. It’s an award-winning sci-fi comedy beloved by sci-fi and comedy fans alike. It’s got big-name actors (Tim Allen, Sigourney Weaver, Alan Rickman), and top-notch special effects (from Industrial Light and Magic and others) that still look good almost twenty years later. And it was the film debut of Justin “I’m a Mac” Long, who subsequently starred in Live Free or Die Hard, Herbie: Fully Loaded, and Accepted.
The premise is that, years after the end of a long-running television show called Galaxy Quest (obviously a parody of Star Trek), the show’s washed up actors (those who played the commander, the attractive woman who talks to the computer, the rubber-headed alien doctor, the young pilot, the tech expert and a one-episode redshirt) are approached at a fan convention by actual aliens who mistakenly believe they are the “never give up, never surrender” heroes they used to portray. Can these human fish out of water pull together to meet this unexpected challenge?
https://itunes.apple.com/us/movie/galaxy-quest/id286147467
See below for a plot summary with SPOILERS in the form of a beat sheet in the style described in Blake Snyder’s Save the Cat.