Ashley travels to Brazil to meet young men living in some of Rio's most notorious favelas who are caught between the deadly grip of drug cartels and heavily armed criminal militias.

South Africa has for years battled the scourge of rhino poaching, fuelled by insatiable demand for their horns in Asia. Ashley embarks on a mission to find out who is behind these brutal acts.

Ashley visits Marseille to meet police, street dealers and hit men all caught up in bloody drug wars that are ravaging France's second-largest city.

Ashley Cain visits some of the most dangerous neighbourhoods in the world to learn more about their issues and what it takes to survive in them.

Sweden has been a European hotspot for gang-related shootings and bombings. Ashley meets gang bosses and teen hit men on the front line of gang warfare.

Ashley heads to the Philippines to find out if joining a gang is the only way to survive in the slum districts of the capital, Manila.