Watch Mafia's Most Wanted

Former FBI agent Joe Pistone, who infiltrated the Mafia for six years as Donnie Brasco, reveals how his undercover work led to more than 100 convictions - and resulted in the death of underworld figure Dominick `Sonny Black' Napolitano.

The story of crime boss Charlie `Lucky' Luciano, who used his Mafia connections to help the US government during the Second World War in return for his parole.

What happened when the FBI pursued the five families who ran organized crime in New York, and the fate of two informers is revealed?

The story of Roy DeMeo, a member of the infamous Gambino family who was suspected of heading a crew that killed and dismembered dozens of people.

The story of Meyer Lansky, an associate of Lucky Luciano who was linked to criminal financial operations, but the FBI struggled to pin anything on him - or find his riches.

The story of Vito Genovese, who ruthlessly dealt with disloyalty in the Mafia and quickly rose to prominence - but unwittingly caused his own downfall.

The story of mobster Joe Colombo, whose love of fame and money was matched by his determination to campaign against Italian-American harassment in the 1970s.

A close associate of longtime Teamsters President Jimmy Hoffa and associated with the Chicago Outfit, Allen Dorfman embezzled millions for the mob and himself until he was violently murdered in 1983.

The story of hitman Joe Valachi, the first Mafia member to break the code of silence and turn public informer.

The story of Carmine Galante, who made money from selling heroin, and still profited from his drug empire while locked in prison.

The story of Tony Spilotro, who protected the Chicago Mafia's interests in the casinos of Las Vegas and became a target for the FBI.

The story of ambitious American mobster John Gotti, who became the boss of the Gambino family by ordering the death of the group's former head. He earned the nickname 'Teflon Don' after three acquittals.

Revealing the secrets of the Mafia's most notorious members, beginning with Sam Giancana, who was associated with the Kennedys, Frank Sinatra and the CIA.