At the height of the London blitz, Dr Lennox Collins, pioneer of the new forensic science, is enlisted by DI Wilkins after prostitute Mary Williams is strangled and a swastika carved on her tongue.

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Main Cast: Tamzin Merchant, Patrick Kennedy, Emerald Fennell, James Fleet, David Sturzaker, Iain McKee, Ryan Gage, Holly Atkins, Richard Bremmer, Susie Blake

Director: Geoffrey Sax

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