Going out on a raid with the army, Ross finds out just how prevalent cocaine is in Colombia. He then heads up into the mountains to hear about the Cali Cartel from the son of its founder. . . Gilberto Rodriguez.

To uncover how the mafia has worked in the UK, Ross heads to New York. Meeting Salvatore ‘Crazy Sal' Polisi, a mafia enforcer in the 1970s, Ross learns how in the 1920's British bootleggers exported alcohol to the US during prohibition and in doing so helped build the mafia.

The renowned actor, journalist and investigator reveals the surprising and deep-rooted influence the Mafia has within the United Kingdom - unveiling the Mafia bosses, capos and hitmen who work next door, from caravan parks to shoe shops, cafés to newsagents. He begins in London, recalling 1982 when the body of the so-called 'God's Banker', Roberto Calvi, was discovered under Blackfriars Bridge with his pockets stuffed full of foreign currency from all over the world.