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World's Most Evil Killers

S3, EP1 "Karol Kot"

A profile of Karol Kot, also known as the Vampire of Krokow, who killed an 11-year-old boy and an 86-year-old woman, before attempting to kill more in prison.

World's Most Evil Killers

S2, EP20 "Pawel Tuchlin"

An examination of the Polish serial killer who came to be known as The Scorpion.

World's Most Evil Killers

S2, EP18 "Jack Unterweger"

A look at serial killer Jack Unterwger.

World's Most Evil Killers

S3, EP9 "Robert Black"

Scottish serial killer Robert Black attacks four young girls between 1981 and 1986; he is sentenced to life imprisonment at HMP Maghaberry with a minimum sentence of 35 years and is linked to 13 other child murders.

World's Most Evil Killers

S3, EP8 "Robert Lee Yates Jr."

Robert Lee Yates kills 13 prostitutes in Spokane, Wash., between 1996 and 1998 and later confesses to two other murders committed in 1975 and 1988.

World's Most Evil Killers

S3, EP7 "Aileen Wuornos"

From November 1989 to November 1990, Aileen Wuornos kills at least six men in Florida.

World's Most Evil Killers

S4, EP14 "Robert Ben Rhoades"

Robert Benjamin Rhoades, also known as The Truck Stop Killer, is an American serial killer and rapist.

Britain's Most Evil Killers

S4, EP8 "The Fox"

Arthur Hutchinson, a violent sexual predator and notorious murderer, breaks into a home and murders three family members.

Unsolved Mysteries

S8, EP9 "Unsolved Mysteries"

Priest Killer; Chicago Kidnap; Brinks; QI Gong; Update: Ready Teller Robbery; Such is Life.

Unsolved Mysteries

S8, EP10 "Diaz Dog Days"

Diaz Dog Days: Part 1 and 2; Murder by Arson; Baby Broker; Lost Sailor.

Unsolved Mysteries

S8, EP11 "Donald Eugene Webb"

Donald Eugene Webb; Internet Abduction; Child Prodigies; Fatal Obsession; Update: Surprise Sister; Oregon Heir.

Unsolved Mysteries

S8, EP12 "Repairman Death"

Repairman Death; Hero Molester; White Bird; Heads Up; Update on Mary and Martha; Nazi's Lazarus.

Unsolved Mysteries

S8, EP13 "Unsolved Mysteries"

Kay Hall; Mail Bombings; Trish's Miracle; Powers of Katie; Best Friends.

Unsolved Mysteries

S8, EP14 "Motorcycle Murder"

Motorcycle Murder; Amber Swartz; Carlos' Con; Maine Petition; Message in a Bottle; Foster Son.

Unsolved Mysteries

S8, EP15 "RFK"

R.F. Kennedy Part 1 and 2; Gurdon Light; Tina's Search; Where's Baby Le-Zhan; Doggie Bowser MD.

Unsolved Mysteries

S8, EP15 "RFK"

R.F. Kennedy Part 1 and 2; Gurdon Light; Tina's Search; Where's Baby Le-Zhan; Doggie Bowser MD.

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