Denis Leary Tommy Gavin Actor, Writer James McCaffrey Jimmy Keefe Actor Andrea Roth Janet Gavin Actor Michael Lombardi Mike Silletti Actor Jack McGee Chief Jerry Reilly Actor Steven Pasquale Sean Garrity Actor Daniel Sunjata Franco Rivera Actor John Scurti Lt. Kenny "Lou" Shea Actor Tatum O'Neal Maggie Gavin Actor Callie Thorne Sheila Keefe Actor Rebekah Aramini Guest Star Jennifer Esposito Guest Star Desmond Harrington Guest Star Tim Miller Guest Star Manny Perez Guest Star Peter Tolan Executive Producer, Writer Jim Serpico Executive Producer Kerry Orent Producer Jace Alexander Director