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Watch S7, EP1: Stephen Unwin & William McFall with Fubo for $0 Today

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After striking up a friendship in prison for previous murders, Stephen Unwin and William McFall's release had awful consequences.

After striking up a friendship in prison for previous murders, Stephen Unwin and William McFall's release had awful consequences.

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More episodes

World's Most Evil Killers

S5, EP12 "Victor Ferrant"

Victor Farrant is a convicted rapist who murdered his former girlfriend in 1996.

World's Most Evil Killers

S5, EP16 "Keith Jesperson"

Keith Jesperson, known as the Smiley Face Killer, brutally killed at least eight women across five American states in the early 1990s.

World's Most Evil Killers

S8, EP13 "Jordan Monaghan"

Jordan Monaghan kills his 24-day-old daughter Ruby on New Year's Day in January 2013.

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

S9, EP17 "Emanuel Webb"

A decade-old link revealed a serial killer who kept the same M.O. after moving far away.

World's Most Evil Killers

S9, EP12 "William Devin Howell"

Gardener William Howell used his van as a "murder mobile," killing women and dumping bodies.

World's Most Evil Killers

S9, EP3 "Robert Howard"

Robert Howard manipulated and preyed on vulnerable women across countries.

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, Jane Monckton-Smith, Matthew James Morrison, Roberto Vivancos, Ross Huguet, Stuart Hamilton, Tom Bonington, Yanick Ghanty
Original Air Date: Aug 10, 2017
Genres: DocuseriesTV Series
Rating: MA 15+
Playback: HD
9 seasons available on demand
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