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Gun-for-hire Joe "Mad Dog" Sullivan tries to hide his criminal activities from his family, but an addiction to drugs, betrayal and murder would prove his undoing.
Frank Calabrese Jr., son of mobster Frank Calabrese, flipped against his father, and nearly brought down the vaunted Chicago Outfit.
"Mad Sam" DeStefano had a three-decade reign as a juice loan lender and sadistic enforcer with the notorious Chicago Outfit.
Richard Kuklinski lived a shocking double life; suburban husband and father at home, and brutal contract killer on the streets.
Carmine Persico stands as one of most enduring Godfathers in mafia history.
Gregory Scarpa lived a charmed triple life; mafia hit man, loving father and husband, and secret FBI informant.
Jimmy Burke was one of the most prolific mob earners in New York history.
Two New York City cops Louis Eppolito and Stephen Caracappa were secretly working as hired guns for the Mafia.
Irish mobster Danny Greene clashed with the Cleveland mafia; a bombing war that would eventually destroy them both.
As leader of Murder, Inc., Albert Anastasia became one of the most vicious and feared mob bosses of the twentieth century.
Tommy Pitera became one of the most violent men of all time in the 1980's; betrayal brought the mob killer to justice.
During the 1970's, Anthony Cassa became the under boss of the Lucchese family.
Joey Massino brought the Bonanno mob family back after it was destroyed by the FBI.
After Roy Albert DeMeo was brought into the Gambino family as an associate, he became the mastermind behind a gang thought to be responsible for up to 200 murders.
Joey Gallo rises from the slums of Brooklyn to take on the biggest mafia dons of the 1950s and 1960s.
A group of ruthless Irish punks called the "Westies" terrorize Hell's Kitchen in New York City in the the 1970s.
Heroin kingpin Leroy "Nicky" Barnes turns government informant, destroying the drug trafficking empire he took so long to build.
Frank Nitti joined Al Capone's criminal empire in 1920, rising quickly in the organization; in 1933, Frank caught his big break when Capone went to prison for tax evasion, and Nitti took over his criminal enterprise.
Six of the most notorious mafia killings of all time and the effects they had on organized crime.
James "Whitey" Bulger reigned supreme in the Boston underworld for over 20 years, consolidating his power by ratting out rivals to the FBI.
A ruthless gang called "Murder, Inc." carried out mob hits during the 1930s; Mob leaders formed The Syndicate, and as their enforcement arm, members of Murder, Inc. killed an estimated 1,000 people from coast to coast.
Tommy Lucchese, one of the most successful and notorious members of the Italian-American Mafia, pioneered and perfected labor rackets in New York City's kosher chicken industry, the garment district and the world of professional boxing.
"Big Paul" Castellano serves as a boss of the Gambino crime family during the '70s and '80s, overseeing rackets in construction, pornography and more.
John Gotti starts out as the leader of a group of young thugs in his South Bronx neighborhood and works his way up to a leadership position in the Gambino crime family.
Carlos Marcello becomes the mafia boss of New Orleans in 1947 and maintains power for almost four decades.
Heroin kingpin Frank Lucas dominated the Harlem drug market from 1968 to 1975, before being busted for conspiracy to distribute heroin and serving 5 year of his 70-year sentence.
Two of America's most powerful and feared mob bosses, Santo Trafficante Sr. and his son, ruled a criminal empire that stretched from the Gulf Coast to the Caribbean.
Tony Spilotro made his name in Chicago's most powerful organized crime family and was given control of the gang's casino interests in Las Vegas.
Virginia Hill, Arlyne Brickman and Karen Hill are mob ladies with looks that could kill and the connections to take out anyone in their way.
Philadelphia mob boss Nicky Scarfo's paranoia, volatility and treachery ultimately lead to his demise.