This September, Ross Kemp and his award-winning team travel the globe, securing access to the brutal gangs who terrorise their communities in Los Angeles, Bulgaria and Belize, for a fourth series of Ross Kemp On Gangs.

Described as the “gang capital of the world” by its own mayor, Los Angeles has over 1,000 gangs and 100,000 gang members. Ross arrives in LA in the midst of a turf war, as the infamous Bloods and Crips appear to be fighting a losing battle with Latino gangs for control of the streets. Witnessing the chaos caused by the ongoing violence, Ross meets gang members and the victims of LA’s unglamorous and terrifying world.

The Roma are the biggest ethnic minority in central and Eastern Europe, an often marginalised minority reportedly involved in people trafficking, the sex trade and pick-pocketing. Ross travels to Sofia and Plovdiv, where he explores the secretive world of Bulgaria’s gangs and spends time with Roma families to understand what it means to be a member of a Gypsy gang.

In Belize, Ross discovers how this once-sleepy corner of the British Empire has descended into a virtual narco-state. Despite its miniscule size, Belize is the sixth likeliest place in the world to die from a gunshot wound. Fuelled by unemployment and a rampant drugs trade, gangs are battling a turf war in the slums of Belize City, where the murder rate is five times higher than that of the US.

Ross comments; “We’ve been very fortunate in finding rich materials again, our researchers have been fantastic and all the films are very different”.

Ross Kemp On Gangs, from Monday 1 September only on Sky1 and Sky1 HD.