Castle & Beckett investigate a shop that sells bondage gear that might be involved in the killing.
Castle & Beckett meet dominatrix Lady Irena in the Hall Of Shame dungeon.
Castle studies a bondage website at his loft, Alexis comes home in a cheerleading outfit.
Ryan and Esposito question Mistress Sapphire and some of the other dominatrix.
(0:22) Castle surfs the House of Pain website at home, then Alexis appears in cheerleader's outfit.
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