Follows the decade-long police investigation into one of Britain’s most dangerous female murderers. Over 20 years, Dena Thompson who was known as ‘The Black Widow’, carried out a sustained campaign of fraud, deception, bigamy and murder. Using Lonely Hearts columns to lure a succession of husbands and dozens of lovers into her life, she was able to coerce them into giving up their life’s savings, their homes, their families and their freedom based on her bizarre but convincing stories.

• Dena Thompson