Den Of Thieves | [s2e21]

: The episode title refers not just to the criminals, but to the feeling that Demming is "stealing" Beckett away from Castle, and Racine’s ability to "steal" the lives of cops who get too close.

: The episode highlights the theme of loyalty and the thin line between justice and corruption, as Esposito struggles to find the truth about Thornton's fate. The "Third Wheel": Enter Detective Demming [S2E21] Den of Thieves

: Detective Demming continues his pursuit of Kate Beckett, much to Rick Castle's annoyance. : The episode title refers not just to

: Esposito is forced to confront the possibility that his old mentor may have "gone bad" and joined the crew of Victor Racine , a ruthless crime lord who has eluded the police for decades. [S2E21] Den of Thieves