A famous mystery writer uses his own plot tricks to murder a blackmailer in this British thriller.
DIRECTOR
CAST
![](https://image.tmdb.org/t/p/w92/mCoR51wCFJIr832DZxJMHESM1hf.jpg)
Hugh Sinclair
Robert Southley
![](https://image.tmdb.org/t/p/w92/9DBEFocvJYMIsOxgDnPPHp0QYZO.jpg)
Dinah Sheridan
Linda
![](https://image.tmdb.org/t/p/w92/cH64YOBvznMvri3P0JLEud7iA59.jpg)
John Laurie
Inspector MacDougall
![](https://image.tmdb.org/t/p/w92/i3WCQnTcMSRXYTEum37rXYpboTz.jpg)
Barry Morse
Harrison
Details
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