Louis Lambardi (Paulie) and Dominick Lombardozzi (Nuzo) who play the Nuzo brothers in this episode are brothers in real life.
The Girard Hirsch character, played by Will Garson, is a crossover from Hawaii Five-O.
Willie Garson played a very similar character, an art thief with an obvious disdain for law enforcement but skirting on either side of the law, in White Collar (2009).