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When Mary Gough is found dead in her family home, her husband Colin Whelan appears shocked.

When Mary Gough is found dead in her family home, her husband Colin Whelan appears shocked.

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World's Most Evil Killers

S7, EP10 "Zahid Zaman"

On the surface, Zahid Zaman portrayed himself as a pillar of the community, but the true story of this cult killer was deeply sinister.

World's Most Evil Killers

S7, EP16 "Heriberto Seda"

A killer who goaded police and media during his spree, Heriberto Seda claimed to kill based on his victims' star signs.

World's Most Evil Killers

S8, EP4 "Jerald Wingeart"

In January 1973, 20-year-old mother of one Dawn Magyar vanishes while on a shopping trip in Owosso, Michigan.

World's Most Evil Killers

S7, EP3 "Lewis Daynes"

Exploring a case highlighting the many dangers of online grooming; on 17 February 2014, fourteen-year-old Breck Bednar was lured to a London flat before being killed by a fellow teenager.

World's Most Evil Killers

S8, EP20 "Eric Locke"

Dublin man Eric Locke refuses to accept it when Sonia Blount, a mother of one, ends their relationship.

World's Most Evil Killers

S8, EP19 "Catherine Nevin"

Catherine Nevin reports a break-in and violent attack at her pub, which leaves her husband dead.

World's Most Evil Killers

S8, EP18 "Charlotte and Linda Mulhall"

In March 2005, the gardaí recover human body parts from the Royal Canal in Dublin.

World's Most Evil Killers

S8, EP17 "Colin Whelan"

When Mary Gough is found dead in her family home, her husband Colin Whelan appears shocked.

An in-depth look at some of the world's most dangerous murderers.
Starring: Andy Gatenby, Christopher Kouros, Elizabeth Yardley, Gareth Lawrence, Geoffrey Osborne, Geoffrey Wansell, Harold Schechter, Helen Morrison, Nicholas Benjamin, Roberto Vivancos, Ross Huguet, Stuart Hamilton, Terri Lemoine, Tom Bonington, Yanick Ghanty
Original Air Date: Aug 10, 2017
Genres: DocuseriesTV Series
Rating: MA 15+
Playback: HD
8 seasons available on demand
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