I really loved the fact that Capone's presence has Barker looking into a mirror of where he's been and maybe even how far he's come and that he doesn't want to go back. Both Barker and Capone give you a really good idea of how deep these guys go and how close they get to their targets. The great twist was that you really didn't know who's side Capone was on until the end. This episode really shows the dark side of undercover work for it's agents. But I loved that Barker actually learns quite a bit about himself from this assignment.
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