Season 4

01 Mad Dog Sullivan Episode 113th July 2012 Gun-for-hire Joe "Mad Dog" Sullivan tries to hide his criminal activities from his family. 02 Family Secrets Episode 220th July 2012 Frank Calabrese Jr., son of mobster Frank Calabrese, flipped against his father, and nearly brought down the vaunted Chicago Outfit. 03 “Mad Sam” DeStefano Episode 327th July 2012 One of the most violent and outrageous characters in mob history, "Mad Sam" DeStefano lived up to his moniker throughout a three-decade reign as a juice loan lender and sadistic enforcer with the notorious Chicago Outfit. 04 The Iceman: Richard Kuklinski Episode 514th August 2012 Richard Kuklinski lived a shocking double life; suburban husband and father at home, and brutal contract killer on the streets. 05 Carmine ''The Snake'' Persico Episode 621st August 2012 Carmine Persico stands as one of most enduring Godfathers in mafia history. 06 The Grim Reaper: Greg Scarpa Episode 728th August 2012 Gregory Scarpa lived a charmed triple life; mafia hit man, loving father and husband, and secret FBI informant. 07 Jimmy "The Gent" Burke Episode 84th September 2012 Jimmy Burke was one of the most prolific mob earners in New York history.