Serenity
Serenity offers perfect proof that Firefly deserved a better fate than premature TV cancellation. Joss Whedon's acclaimed sci-fi Western hybrid series was ideally suited (in Browncoats, of course) for a big-screen conversion, and this action-packed adventure allows Whedon to fill in the Firefly backstory, especially the history and mystery of the spaceship Serenity's volatile and traumatized stowaway, River Tam (Summer Glau).