Die Ente klingelt um halb acht

Heinz Rühmann

As Dr. Alexander

Hertha Feiler

As Adele

Graziella Granata

As Dr Jaspers

Charles Regnier

As Professor Sauermann

Rudolf Schündler

As Staatsanwalt

John van Dreelen

As Rechtsanwalt Kellermann

Balduin Baas

As Judge

Herbert Bötticher

As Salesman

Sammy Drechsel

As Reporter

Alexander Allerson

As Tommy