Turns out, we're not the only Whedonverse fans excited for Adam Baldwin's upcoming guest spot on ABC's Castle.

Nathan Fillion, who of course starred alongside Adam in the short-lived sci-fi drama Firefly, couldn't be more stoked to reunite with his long-lost buddy.  

"It's going to be a blast," Nathan said on the Kevin & Bean Show yesterday. "He's been really busy. He's been working a lot. Now that he's freed himself up a little, I've managed to steal him."

So far, all we know is that Adam plays a "rough-and-tumble" detective who exposes Castle to a whole other side of the law — a dirtier side. It seems that Nathan doesn't know much else, either.

"We have not started to shoot. It's one episode away. So we're going to finish off this one we just started, and then we're gonna start with Adam," he explained.

You know the rule: Twitpics or it didn't happen!

Source: Kevin & Bean Show


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