Inside the history and inner workings of prisons; covering institutions from the Tower of London to the high-tech ADX through interviews with journalists, former correctional officers and previously incarcerated individuals.
On the Hanoi Hilton, an American POW prison of the Vietnam War located in the city of Hanoi, Vietnam; captives include John McCain, the group of airmen who invent a secret communication code, and Jerimiah Denton who sneaks messages home on live TV.
