Nathan Fillion, James Brolin Nathan Fillion, James Brolin

Castle fans may want to clear their schedules on Monday, Feb. 25. That's the day viewers will finally meet Rick Castle's father!

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Castle
airs Mondays at 10/9c on ABC. The two-parter begins on Feb. 18 and concludes on Feb. 25.

What do you think of Brolin's casting?