Prague is an elegant and cultured city, but it's also a place where sex is for sale, and women here are forced to work as prostitutes by traffickers.

Donal is in Paris, a city on the edge, somewhere a conflict can occur without warning. A place where violent crime is nearly three times the national average and where anyone can get caught in the mayhem.

With a thriving nightlife that celebrates diversity, Odessa is a friendly town; beneath the surface however, lies a culture of fear and intimidation.

Donal is in Dublin, where a billion-year-old drug trade is fueling a local gang war and the authorities are unable to cope.

Donal MacIntyre uncovers the Turkish city of Istanbul's role as part of the Balkan Route of the European heroin trade.

Donal MacIntyre investigates how much crime in Cape Town affects those who live here.