West Yorkshire's notorious HMP Wakefield is known in the prison system as 'Monster Mansion.' It's a warehouse for the worst Category A prisoners, and it's home to some of the most terrible men in British criminal history, such as Roy Whiting, Jeremy Bamber, Charles Bronson and Robert Maudsley. Through interviews with ex-inmates, retired guards and relatives of Britain's most infamous inmates, unlocking the cell doors and uncovering the secrets of life inside the UK's toughest jail.