Killer Couples

Mark Billingham uncovers the story behind Britain's infamous murderers, Myra Hindley and Ian Brady.

John Duffy and David Mulcahy are the most prolific rapists in UK history who turned to murder.

Mark Billingham reveals crimes committed by a flamboyant fake butler and his apprentice.

Wannabe Bonnie & Clyde duo, Lee Whiteley and Debbie Taylor, began an orgy of crime, sex, and murder.