Keck's Exclusives: SNL Star Cast on Up All Night

Long before Nathan Fillion was solving crimes with Stana Katic on Castle, he was soaring through space on the short-lived cult fave Firefly. Now, for the first time, Castle is reuniting Nathan with one of his former co-stars on the ABC crime series. In an episode slated for spring... Read More > Other Links From TVGuide.com CastleNathan FillionStana KaticAdam BaldwinFirefly