After New York's Bonanno mob family was nearly destroyed by an undercover FBI agent, Joseph "Big Joey" Massino brought them back to prominence and became the only major Mafia boss left on the streets...the "Last Don."

Gun-for-hire Joe "Mad Dog" Sullivan tries to hide his criminal activities from his family.

Fashioning himself a modern-day Celtic warrior, 1970's Irish mobster Danny Greene clashed with the Cleveland mafia, resulting in a bombing war that would eventually destroy them both.

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

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.

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

Tommy Pitera became one of the most violent men of all time in the 1980's; betrayal brought the mob killer to justice.

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

As leader of Murder, Inc., Albert Anastasia was one of the most vicious and feared mob bosses of the twentieth century.

In the 1980s, New York City cops Louis Eppolito and Stephen Caracappa were secretly working as hired guns for the Mafia in a scheme that would go down as the worst case of police corruption in NYPD history.

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

During the 1970s, Anthony "Gaspipe" Casso rose through the ranks of the New York Mafia to become underboss of the Lucchese family, raking in millions of dollars through elaborate scams and killing anyone who got in his way.

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

A profile of Jack Ruby (1911-1967), the man who shot and killed Lee Harvey Oswald two days after the 1963 assassination of John F. Kennedy. Included: a discussion of his possible motives for the murder.

Chicago mob boss Sam Giancana (1908-75) is profiled.

Profiling Louis "Lepke" Buchalter (1897-1944), who became a crime boss in the New York City underworld by controlling the garment industry. He was convicted of murder in 1941 and died in the electric chair.

A profile of Sammy "the Bull" Gravano, the admitted mob underboss who testified against John Gotti, the head of the Gambino crime family in New York City, in the early 1990s.

A profile of Benjamin "Bugsy" Siegel (1906-47) chronicles his rise to fame, including his role in building Las Vegas.

A profile of Teamsters leader Jimmy Hoffa, who disappeared in 1975. Included: remarks by his daughter Barbara Crancer and biographer Arthur Sloane.

The Genovese crime family is the subject.

A profile of Frank Costello includes an interview with Anthony Quinn. Frank Costello sees himself as a businessman, preferring diplomacy to violence.

Joseph Valachi is the first syndicate member to testify against the Cosa Nostra and reveal its inner workings.

Financial wizard Meyer Lansky survives some 50 years in organized crime.

A profile of Al Capone, who was Chicago's gangland kingpin in the '20s but was cut down by the IRS in 1931 and spent eight years in Alcatraz.

Vincent Gigante attempts to convince the world that he is legally insane.