A Scotland Yard detective is investigating a string of robberies and a murder, and the information he uncovers leads him to the estate of a wealthy but strange English family, who share their mansion with a group of nuns. The detective comes to suspect that neither the family nor the nuns is quite what they seem to be.
Acting
Robert Morley devouring scenery as only he can.
Production
Creepy manor vibes that out-budget the actual budget.
Director
Cyril Frankel
Stewart Granger
Superintendent Cooper Smith
Susan Hampshire
Trudy Emberday
Cathleen Nesbitt
Livia Emberday
James Culliford
Luke Emberday
Brigitte Horney
Oberin
Robert Morley
Hubert Hamlyn
Sophie Hardy
Sophie
Colin Gordon
Dice
Eddi Arent
Clossen
Diane Clare
Clare
Allan Cuthbertson
Det. Thompson
Caroline Blakiston
Nun
Yuri Borienko
Nailer
Trivia, insights & behind the scenes
This was one of several late-period British thrillers Stewart Granger made before retreating to TV, and he reportedly hated the script.
The 'nuns with secrets' trope here taps into lingering 1960s anxieties about hidden Nazi war criminals in Britain—a real cultural fixation of the era.
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