

02/08/1973
The inventor Sir Claude Amery wants to give the thief of the formula for his latest invention the chance to return it in the dark without being recognized. He gathers everyone in the house in the library and has the lights switched off for a short time. When the light comes back on, Amery is dead. A case for the Belgian master detective Hercule Poirot.

Horst Bollmann
as Hercule Poirot

Heinz Fabian
as Dr. Graham

Ernst Fritz Fürbringer
as Lord Amery

Käthe Haack
as Caroline

Gert Haucke
as Inspec. Japp

Otto Kurth
as Butler

Anita Lochner
as Barbara

Ulli Philipp
as Lucia

Jochen Schmidt
as Richard

Jochen Sostmann
as Cap. Hastings

Friedrich von Thun
as Raynor

Herbert Weicker
as Dr. Carelli
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