Inside the World's Toughest Prisons

Paul serves time in Piotrkow Prison, purpose-built in 2003 to contain the worst of the worst, where he meets a notorious gangland killer and learns how a zero tolerance regime has all but wiped out the Grypser prison gang.

Paul goes to the overcrowded Rizal City Jail in the Phillipines and shares a cell with a convicted murderer.

Crime journalist Paul Connolly is given access to take a look inside one of the toughest jails in Mexico: the El Hongo maximum security prison, a facility where no-one has ever escaped.

Paul Connolly spends a week living inside Danli Prison in Honduras, where the inmates are in charge. With only a translator and an ex-soldier hired as muscle, Connolly navigates through the 'hell hole'.