BBC One series Requiem was inspired by John Dee, who claimed he could 'speak to angels'

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The BBC One series is set in a haunted house in Wales and has hooked millions of viewers.

John Dee was the adviser to the Queen and was credited with coining the term “British Empire”.

But he was a shadowy 16th-century figure who was dogged with rumours of witchcraft and treason.

The TV drama centres on Matilda Gray, a cellist, whose world is turned upside down when her mother kills herself.