En sjöman i frack

Marianne Aminoff as Madeleine Haller Stig Järrel as Professor Petréus Karin Nordgren as Sonja Brink Olof Widgren as Louis Åke Grönberg as Alling Bror Bügler as Borg Börje Mellvig as Waiter Gösta Cederlund as Carlos Haller Adolf Jahr as Allan Linde / Fritjof Karlsson Ernst Brunman as Konradsson Torsten Hillberg as Member of the spy network Georg Funkquist as Anton Carl-Gunnar Wingård as Hjalte Einar Axelsson as Film director Tallén Agda Helin as Woman at the exposition Ragnar Widestedt as Police officer Bellan Roos as House maid on the roof Åke Engfeldt as Journalist Birger Lensander as Film extra Rune Carlsten as Max Ruth Weijden as Woman selling flowers Georg Fernquist as Coat check Rolf Botvid as Belle's lover Carl Hagman as B.Å.G. Jansson Ruth Stevens as Gina Åke Claesson as Ship's captain Harald Svensson as Man at the restaurant

Hilmer Ekdahl Director of Photography Arthur Spjuth Production Manager, Production Design Bibi Lindström Production Design Rolf Husberg Editor Alva Lundin Title Graphics Ragnar Arvedson Director, Writer Börje Larsson Writer