Nathan Fillion on GMA: Castle and Beckett Are Going to "Bare All" in the Season Finale (VIDEO)

Credit: YouTube

Castle star Nathan Fillion stopped by Good Morning America on May 4, 2012 to dish on the Season 4 finale, working with Molly Quinn and Susan Sullivan, and which superhero he'd love to play.


Warning: This clip contains minor spoilers and a sneak peek from the Castle Season 4 finale, "Always."


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