Ross Kemp squares up to the world's hardest streetfighters in Gangs... Across the world millions of people are members of street gangs. In groups they fight, stab, rob, rape and murder anyone who isn't one of their own. And when rival gangs meet - what you get is warfare. Ross Kemp, whose dad was a copper and taught him right from wrong, decided to infiltrate these secret underworld organizations to discover who they are, what makes them tick and what the law is doing to curb their criminal activity. On his harrowing journey he: - meets murderous members of the Number gang in a Cape Town jail...