Though their day jobs often involve a plethora of costumes and hours in a makeup chair, many of our favorite sci-fi stars still enjoy stepping out in costume for a good time on All Hallow's Eve. So for the 31st—and final—of our 31 Days of Halloween features of 2012, we take a peek at the Halloween duds of nearly 20 sci-fi celebs.

You remember when Shia "The Beef" LaBeouf said that Indy 4 was a stinky old pile? And then when Harrison "Indiana frakkin' Jones" said Shia was a moron for having done that? Yeah, those were good times. Unsurprisingly, though, Shia is finally backpedaling.

Details have slowly started trickling out about Ridley Scott's new Blade Runner sequel, and now it seems the sequel might have an even closer tie to the first film than we thought: Could Harrison Ford come back for a cameo as the iconic Replicant hunter Deckard?

It was only yesterday we were hearing rumors that Harrison Ford would be back for Ridley Scott's Blade Runner sequel, despite a producer's past claims that the flick would be Deckard-less. Well, now that same producer is speaking up again, and he's out to quash any rumors of Ford's return.