While the Boston underworld was in chaos in the 1970s, Whitey Bulger schemed and killed his way through the ranks to become the most famous gangster in Boston history as well as the the subject of the longest manhunt in U.S. history.

In the 1990s, three violent cartels battled for control of the Mexican drug world; one brutally ambitious Narco, known as El Chapo, rose above the rest to create one unified cartel, and become the most powerful criminal in Mexico's history.

In the 1970s in Colombia, a petty thief rises to become the most powerful criminal in history, unleashing a bloody reign of terror to create the first global drug cartel and become the first billionaire kingpin of the 20th century.

In 1980s New York, two opposing factions of the American Mafia split the Gambino crime family down the middle; the old school and the new school struggle against one another; one murderous capo emerges as the Boss of Bosses.