Arguably Britain's most infamous serial killer, Peter Sutcliffe became known as The Yorkshire Ripper when he began murdering women in Yorkshire during the 1970's. Despite a 5 year police operation that cost £5 million and ate up over 2 million man hours, Sutcliffe was only caught after a chance encounter with 2 Police constables on a routine patrol. We tell the horrific story of his reign of terror speaking exclusively to Sutcliffe's own brother as well as Neil Jackson, the son of one of his earliest victims. We also talk to one of the detectives who interviewed Sutcliffe as part of the inquiry, to lay bare the mistakes that were made that allowed him to carry on killing for so long.

In the summer of 1993, gay men in London was being terrorised by a brutal killer. Colin Ireland, a loner from Southend had made a macabre resolution - to become a serial killer. For 3 months he hunted men, picking them up in a central London gay bar, taking them back to their flats and then strangling them. We talk to Ireland's ex wife and friends to uncover what made him tick. We also focus on the men tasked with catching him and how separate murder inquiries turned into a city wide manhunt.