Firefly's 'Capt. Tightpants' lives again on ABC (video)

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Dec 14, 2012, 4:09 PM EST

We don't watch ABC's romantic comedy detective series Castle, starring Nathan Fillion, though we've heard good things, but after watching the following promo, we give them high marks for sci-fi cred: Among other things, Fillion's character dresses up for Halloween in a very familiar Browncoat and tight-pants outfit.

Added to that, he actually references a certain teen-vampire-slaying series in which Fillion once had a prominent role, and also a certain vampires-versus-werewolves franchise that, as far as we know, he has nothing to do with.

So great to see Fillion with the familiar suspenders and sidearm, isn't it?

The Castle Halloween episode, "Vampire Weekend," airs Monday at 10 p.m. ET/PT.