World's Most Evil Killers

Mark Goudeau - The Baseline Killer: A man who terrorised Phoenix in an extensive year-long crime spree, committing nine murders with no apparent motive. (S7, ep 7)

Ted Bundy: A look at the life - and horrifying crimes - of Ted Bundy, a notorious serial killer who murdered at least 30 young women and girls between 1974 and 1978.

Ted Bundy: A look at the life - and horrifying crimes - of Ted Bundy, a notorious serial killer who murdered at least 30 young women and girls between 1974 and 1978.

Lester Jones: Mother Paige Birgfeld went missing in 2007 and her remains were found five years later. A decade on, police closed the net on a local mechanic. (S8, ep 1)

Lester Jones: Mother Paige Birgfeld went missing in 2007 and her remains were found five years later. A decade on, police closed the net on a local mechanic. (S8, ep 1)

Paul Runge: A killer who found some of his victims through ads, the case of Paul Runge became prominent in the debate over the death penalty in Illinois. (S7, ep 8)

Paul Runge: A killer who found some of his victims through ads, the case of Paul Runge became prominent in the debate over the death penalty in Illinois. (S7, ep 8)

Aileen Wuornos: A look at the life and crimes of the serial killer, whose story was featured in the Oscar-winning film Monster, and who was executed in 2002.

Aileen Wuornos: A look at the life and crimes of the serial killer, whose story was featured in the Oscar-winning film Monster, and who was executed in 2002.

Jerald Wingeart: In 1973, Dawn Magyar's body was found two months after she had vanished. Twenty-eight years on, advances in forensics helped solve the case. (S8, ep 2)

Jerald Wingeart: In 1973, Dawn Magyar's body was found two months after she had vanished. Twenty-eight years on, advances in forensics helped solve the case. (S8, ep 2)

Ronald Dominique - The Bayou Strangler: A serial killer and rapist who murdered at least 23 men and boys, this is the little-known case of Ronald Dominique. (S7, ep 9)

Ronald Dominique - The Bayou Strangler: A serial killer and rapist who murdered at least 23 men and boys, this is the little-known case of Ronald Dominique. (S7, ep 9)

Dennis Rader: A look at the horrific crimes of the serial killer who dubbed himself BTK - meaning 'Bind, Torture, Kill'.

Dennis Rader: A look at the horrific crimes of the serial killer who dubbed himself BTK - meaning 'Bind, Torture, Kill'.

John Eric Armstrong: In 1999 and 2000, John Eric Armstrong prowled Detroit looking for sex workers. A seemingly normal father, no one suspected he was a killer. (S8, ep 3)

John Eric Armstrong: In 1999 and 2000, John Eric Armstrong prowled Detroit looking for sex workers. A seemingly normal father, no one suspected he was a killer. (S8, ep 3)

Paul Michael Stephani - The Weepy-Voiced Killer: The story of a killer who was infamous for his whimpering confessions over the phone after each of his murders. (S7, ep 10)

Paul Michael Stephani - The Weepy-Voiced Killer: The story of a killer who was infamous for his whimpering confessions over the phone after each of his murders. (S7, ep 10)

Robert Lee Yates: A profile of the serial killer, who narrowly avoided the death penalty for killing at least 13 sex workers during a horrific reign of terror.

Robert Lee Yates: A profile of the serial killer, who narrowly avoided the death penalty for killing at least 13 sex workers during a horrific reign of terror.

Richard Biegenwald: Over a 25-year career of murder, Richard Biegenwald killed at least six people as he sought out ever more inventive ways of dealing death. (S8, ep 4)

Richard Biegenwald: Over a 25-year career of murder, Richard Biegenwald killed at least six people as he sought out ever more inventive ways of dealing death. (S8, ep 4)

Lester Jones: Mother Paige Birgfeld went missing in 2007 and her remains were found five years later. A decade on, police closed the net on a local mechanic. (S8, ep 1)

Lester Jones: Mother Paige Birgfeld went missing in 2007 and her remains were found five years later. A decade on, police closed the net on a local mechanic. (S8, ep 1)

Danny Rolling: A profile of the serial killer known as The Gainesville Ripper, who targeted Florida students with crimes so horrific that he inspired the movie Scream.

Danny Rolling: A profile of the serial killer known as The Gainesville Ripper, who targeted Florida students with crimes so horrific that he inspired the movie Scream.