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Castle Preview: Why Does Kelly Hu 'Spark' Espo's Interest? Plus: Watch an Exclusive Clip

Tonight on Castle (ABC, 10/9c), when the producer of a Girls Gone Wild-esque video series turns up dead, his bodyguard (played by X-Men 2‘s Kelly Hu) draws Detective Esposito’s interest — in more ways than one. And we’ve got an exclusive first look. READ MORE & WATCH VIDEO