World's Most Evil Killers säsong 2

An examination of Mick Philpott, the notorious Derby father of 17 who murdered six children, five of them his own, when he set his own home on fire.

In 2012, April Jones disappeared from outside her home in Wales, never to be seen again. Her abductor, and murderer, was found to be Mark Bridger.

Dubbed the Grindr Killer, serial rapist Stephen Port murdered at least four men by using gay social networks to find his victims.

Analysis of what drove Raoul Moat to shoot his ex-girlfriend, her new lover and a policeman, leading to the largest manhunt in modern British history.

A profile of child killer Roy Whiting, the convicted sex offender who abducted and murdered eight-year-old Sarah Payne.

A profile of the two murderers who terrorised Britain in the 1980s with a string of attacks near railway stations.

A profile of the former aspiring model who stabbed her fiance 42 times, before blaming the attack on a fictional road rage assailant.

Steven Grieveson murdered four teenage boys in 1994 in his reign as the Sunderland Strangler before his capture.

The case of the cannibal cop killer, Stefano Brizzi, who murdered and consumed part of a police officer he met through a dating app.

Danilo Restivo, originally from Italy, was jailed for murdering and mutilating his Bournemouth neighbour, Heather Barnett, in 2002.