Galaxy Quest is about the cast of a once-popular television space-adventure series called Galaxy Quest. The fictional series starred Jason Nesmith as the commander of a spaceship called the NSEA Protector, Alexander Dane as the ship's alien science officer, Fred Kwan as the chief engineer, Gwen DeMarco as the computer officer, and Tommy Webber as a precocious child pilot. Guy Fleegman played a bit role in one episode, an unnamed security officer who was quickly killed off in his only appearance on the show.