Held in large cage-like dwellings for up to 24 men, the inmates have developed a strange and violent jail culture. The men - who remain in the cells almost all the time and may only leave for yard time twice a week - live under the sway of a gladiatorial code.
It's on BBC 2 this Sunday and I think it will be interesting. There is a small clip of it here
I'm really looking forward to it as I like Louis' style.