He talks to the man who broke the bank, Nick Leeson, about his time in a Singapore prison.
He talks to human rights campaigner James Mawdsley about the time he spent in jail for highlighting abuse in Burma.
Today he talks to Tracy Kirby about her time in prison after being falsely accused of being a drugs courier.
Derek Ogg talks to Jonathan Aitken about his time in jail and the effect it had on him and his life.
5/6. Advocate Derek Ogg talks to people who have spent time behind bars. Today he hears from former Zimbabwean MP Roy Bennett, about how he was jailed for opposing Robert Mugabe.
Today he visits H Block at HMP the Maze with Patrick McGee, the man who blew up the Grand Hotel in Brighton.