Galaxy Quest

...a fast, loose, and very funny parody that pulls off the not-so-simple feat of tweaking Trekkies and honoring them, ribbing long-in-the-tooth actors and applauding them...

The has-been cast of a cult TV sci-fi series are abducted by aliens to save the universe for real, and in struggling to rise to the occasion, manage to pastiche every cliché in the sci-fi TV series handbook.

The movie's humor works best when the illogic of the TV show gets in the way.

Rickman is superb as the prissy English stage actor who deeply resents the fact that he'll forever be recognised as a cliché-spouting alien...

In terms of parodying all things Star Trek, Galaxy Quest is often inventive, hitting both obvious and not-so-obvious targets.