628. Jack The Ripper: The Killer Unmasked (Part 5)

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Mentioned as the comic book that was adapted into the 2001 film starring Johnny Depp and Ian Holm about Jack the Ripper

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Described as 'really the definitive survey of the case' and referenced multiple times throughout the episode as a key source for information about Jack the Ripper suspects

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Described as 'perhaps the single most notorious book ever written about Jack the Ripper' which proposed the royal conspiracy theory involving Prince Albert Victor and Sir William Gull

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Mentioned that the crime novelist has written two books about Walter Sickert as a Ripper suspect, buying 30 Sickert paintings for her research

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Referenced as Sickert's biographer who claims Sickert was in France for at least four of the killings, providing an alibi

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Mentioned as the person who first proposed Walter Sickert as a suspect in 1959, described as someone who 'wrote kind of books about spy stories and murder mysteries'