Serenity now!

If you liked the TV show Firefly, the big-screen version, Serenity will not disappoint. Thrill, delight, and occasionally horrify (Joss Whedon is a cruel, cruel man), but not disappoint.

If you never saw the TV show, the movie will be a bit less satisfying and a bit harder to get into. Nonetheless, it's worth it -- funny characters, some genuinely creepy scares, spectacular effects and a few terrific action sequences.