Galaxy Quest is still knocking about neighborhood theaters, and it’s worth a look. Initially marketed as a space romp for the family, it’s closer to being a satire of those films. A cast of TV actors in a Star Trek-style series ends up in a real interstellar shootout, and the drolleries take precedence over the special effects. The performers, including Sigourney Weaver, Tony Shalhoub, and Tim Allen, achieve a lilting tone of self-mockery, and, as the Shakespearean actor reduced to playing an alien crew member with a crustaceoid forehead, Alan Rickman continues his unbroken string of stealing every movie he’s in.