This is the only film I've ever paid for on pay-per-view. That's after I saw it in the cinema and before I bought it on DVD. If you've read the Amazon review above then you'll more or less know what it's about. It's something of a spoof on the reinvention of Star Trek which took place decades after the original show was cancelled. It's also an amazing film in its own right.
This begins with the casting: Tim Allen comes with all the comedy credentials to make this film fly, but the inclusion of SF icon Sigourney Weaver makes it more of an A-movie than any of the films or series it spoofs. Then there's veteran thespian Alan Rickman, who could raise the level of any production. (Interestingly, one of Alan Rickman's early TV credits was as Brownlow in Smiley's People, which also featured a certain Patrick Stewart as Karla).
Sigourney Weaver! Interestingly, Weaver went on record during the making of this film as saying 'I put on a blonde wig and didn't say an intelligent thing for six months'.
You should have gathered that this is not the usual Spaceballs/ Airplane 3/ Men in White type of sci-fi spoof. Although it accurately satirises the conventions of Star Trek (as well as Star Trek conventions), it has its own first rate special effects and a plot that would stand up just as well if it was played as a straight, if rather quirky, SF adventure.
This is a film that everyone could be proud of, including the people who were being satirised. Interestingly, Jeri Ryan (Seven-of-nine, Voyager) makes a point of including a couple of photos of her at the Galaxy Quest premiere on her fansite.
Is it worth buying? Well, it's more or less the most played and most borrowed DVD in my collection. This film is simply, so good ...