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Castle (2009) Season 2 Episode 16 - The Mistress Always Spanks Twice
When a half-naked woman is found covered in caramel sauce and hanging by bondage cuffs in a public park, Castle and Beckett’s investigation takes them into New York’s underground world of sexual domination. Naturally the case serves as sexy fodder for their already charged relationship banter.
Air Date: 8 Mar 2010