Britain's Most Evil Killers - Season 6 (2021)

The story of Sarah Williams and Katrina Walsh, friends who carried out the evil, jealousy-fueled murder of businesswoman Sadie Hartley.

The chilling story of Lee Ford, who killed his wife and four stepchildren in a cold-blooded murder spree over 24 hours in September 2000.

The story of 27-year-old Pawel Relowicz, who raped and killed 21-year-old Hull student Libby Squire in a case that made headlines around the UK.

British killer Daniel Gonzalez, also known as the Freddy Krueger Killer, who took four lives during a chilling two-day murder spree in 2004 after being inspired by horror films.

The story of serial killer Geoffrey Evans and his accomplice John Shaw, who hit headlines in 1976 after the murders of two women in Ireland.

The chilling story of Mark Martin, who murdered three homeless women in his quest to become Nottingham's first serial killer.

The story of Malcolm Green, who was jailed for life for the brutal murder of a Cardiff prostitute, only to kill again when he was released after 18 years.