Mobsters

The Chicago Mafia faces great upheaval when Frank Calabrese Jr. turns informant against his mob boss father.

During a 30-year criminal career, "Mad Sam" DeStefano gains notoriety for his extreme violence as a Chicago loan shark.

For decades, Richard Kuklinski leads two lives, one as an ordinary suburban father and the other as a cold-blooded contract killer.

Carmine "The Snake" Persico becomes one of the most important figures in mob history, leading the formidable Colombo crime family for more than 30 years.

Juggling conflicting identities, Gregory Scarpa lives a complicated existence as a Mafia contract killer, FBI informant and loving family man.

Jimmy Burke, whose criminal history inspired the film "Goodfellas," builds a reputation as one of New York's top mob earners.