Dean Parisot's spoof is about an old TV show called Galaxy Quest (i.e., Star Trek) whose cast -- including pompous Alexander Dane (Alan Rickman) and former bombshell Gwen DeMarco (Sigourney Weaver) -- are now on the convention circuit. When naive and endangered aliens land on earth, the egomaniacal James Nesmith (Tim Allen), unable to put his past as Commander Peter Quincy Taggart behind him, persuades his fellow actors to pretend to be the parts they played on the show. What saves the film is the inclusion of the show's Trekkie-esque fans. Initially mocked, they're heroes by the end, and the movie becomes a celebration rather than a condemnation of fandom.