Jean Ritchie

The documentary examines Myra Hindley's psyche, the nature of her relationship with Ian Brady, her background, and time in prison. When Moors murderer Myra Hindley died on 15 November, she was Britain's longest serving woman prisoner - spending 36 years in jail. Hindley was jailed for life in 1966 for murdering two children with her lover Ian Brady.

The vast majority of killers prey on their victims alone and undercover, but in a tiny number of cases, two people are drawn together to form a deadly duo. And when they do, they’re usually even more brutal and sadistic than those who murder alone. In Killer Couples, popular crime writer Mark Billingham examines four unique and mind-boggling cases.