Hammer's latest is an enjoyably half-baked foray into the paranormal which mashes together ideas from Peeping Tom, The Exorcist and Dennis Wheatley in random fashion.
Jared Harris is good value as the eccentric professor who keeps a disturbed young woman (Olivia Cooke) locked up for observation.
In case we're in any doubt of the early 1970s setting, Erin Richards wears hot pants and mini skirts while the sound of Slade is never far away – and nor is that of the screaming.
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