Black Coffee
Plot: 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

Horst Bollmann
Heinz Fabian
Ernst Fritz Fürbringer
Käthe Haack
Gert Haucke
Anita Lochner
Ulli Philipp
Friedrich von Thun
Claus Peter Witt
Agatha Christie