Mal Reynolds, Nathan Fillion's character from the short-lived Joss Whedon series, Firefly, made a triumphant return to television last night. Granted, it was only for a little bit, and Fillion wasn't specifically playing Mal, but the costume was there, in all of its spacey glory.

Last night's episode of Castle was Halloween-themed, and, well, you can probably see where this is going. I wouldn't be surprised at all if Fillion had a section in his contract for Castle that says, "if ever the opportunity arises, I will be able to dress up as Mal, because damnit, I miss that (brown)coat." So last night, the worlds of Firefly and Castle collided, and Nathan Fillion once again donned Mal's brown duster as part of his "Space Cowboy" Halloween costume.