Dallas County Jail, Dallas. Texas, USA

S1, E4: The Dallas County Jail in Texas - a supersized facility with beds for 7,100 inmates. There, inmates brought in for anything from minor crime to serial killing await their court dates. Up to 300 new arrivals come in per day. The biggest threat in the prison? Turf wars. With the surplus of inmates, there is less space to divide up between them, leading to relentless gang warfare.