There was once only one Mafia, now every country seems to have its own. Until fairly recently gangsters kept to their territories, but crime - like every other business - has been quick to take advantage of the global economy. Business, it seems, is good, with over $150 billion laundered each year in Europe alone. London crime firms sell Lebanese heroin provided by Turkish gangs, Colombian cocaine obtained from Nigeria, and crack produced by Jamaican Yardies. Arrangements with the Mafia, the Triads, the Yakuza, the Russian Mafiya and the South American cartels allow a tide of misery to enter the UK through the back door.

Dirty Cash looks at modern organised crime, from the street gangs whose daily business includes drug dealing, prostitution and robbery, through to the gigantic organisations behind it all. The vicious war between crime and law enforcement is raging all around us, and it's a war we can't afford to lose.