En sjöman i frack

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

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