The first episode looks at Sam "Mooney" Giancana who in 1961 was the boss of the Chicago organised crime outfit and the heir of Al Capone. "Mooney" Giancanae controlled the Las Vegas casinos, and made millions for the mob, but he was also violent and unpredictable and he made a disastrous mistake. In a deal in part brokered by Frank Sinatra, he helped get John F Kennedy elected President. But instead of giving him favours in return, JFK made his brother Bobby Attorney-General. Bobby then unleashed a fevered campaign against organised crime. For the first time in its history, the Mob was on the run. Not even the assassination of both Jack and Bobby Kennedy could end the pressure on the Chicago mob. In 1975 Sam Giancana was brought back as a reluctant FBI witness. His former colleagues were waiting for him. He was shot in the head at close range by a friend with a silenced .22 revolver.