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6 Sneak Peeks At Castle Episode 4.21 ‘Headhunters’

By on April 16, 2012
Nathan Fillion and Adam Baldwin in Castle (Image © ABC. All Rights Reserved.)

Nathan Fillion and Adam Baldwin in Castle (Image © ABC. All Rights Reserved.)

Don’t miss the Firefly reunion on ABC’s Castle tonight as Castle (Nathan Fillion) meets former co-star Adam Baldwin as Detective Ethan Slaughter, a tough and colorful cop who may just prove the perfect antidote to Beckett.

Catch ‘Headhunters’  Monday, April 16 at 10 PM ET/PT on ABC.

‘Headhunters’ Promo Trailer