En sjöman i frack

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

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