In the movie, Allen plays washed up actor Jason Nesmith who is tired of being connected to his most notable role, Commander Peter Quincy Taggart on the television show Galaxy Quest.
Watching Allen (and the rest of the cast, which included Sigourney Weaver, Alan Rickman, Tony Shalhoub, and Sam Rockwell) take on the roles of actors mistaken for actual space commanders by the Thermians never gets old.
The television star (the actor and the character) have such disdain on his face throughout the first half is amazingly realistic and the joy later on is more than earned.
If the 1990s belonged to anyone it would be Tim Allen and the film and television actor ended the decade (and the 20th Century) on a fairly high note with the 1999 Star Trek parody Galaxy Quest, which had more originality and heart than anyone would have ever suspected.