2. Family Secrets

Frank Calabrese Jr., son of mobster Frank Calabrese, flipped against his father, and nearly brought down the vaunted Chicago Outfit.

3. “Mad Sam” DeStefano

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.

5. The Iceman: Richard Kuklinski

Richard Kuklinski lived a shocking double life; suburban husband and father at home, and brutal contract killer on the streets.

6. Carmine ''The Snake'' Persico

Carmine Persico stands as one of most enduring Godfathers in mafia history.

7. The Grim Reaper: Greg Scarpa

Gregory Scarpa lived a charmed triple life; mafia hit man, loving father and husband, and secret FBI informant.

8. Jimmy "The Gent" Burke

Jimmy Burke was one of the most prolific mob earners in New York history.