Inga Tidblad
— Cathérine von Wismar
Holger Löwenadler
— Carl Gustav von Wismar
Lauritz Falk
— Lieutenant Rehusen
Erik Hell
— Möllersten
Stig Järrel
— Riddercrantz
Erik 'Bullen' Berglund
— Tarnow, Russian
Hugo Björne
— Adlerhjelm
Björn Berglund
— Manderberg
Emil Fjellström
— skipper Nordström, pilot
Frank Sundström
— Gustav III
Wiktor Andersson
— man at the Blue Gate Inn (uncredited)
Olga Appellöf
— Archdeacon at Cathérine's musical soiree (uncredited)
Josua Bengtson
— conspirator on board the ship (uncredited)
Ann-Margret Bergendahl
— lady in von Wismar's park (uncredited)
Julie Bernby
— maid at the Blue Gate inn throwing out the contents of a chamberpot (uncredited)
Ernst Brunman
— man at the Blue Gate Inn (uncredited)
Carl-Hugo Calander
— Lord (uncredited)
Åke Claesson
— Police Chief (uncredited)
Nancy Dalunde
— Archdeacon at Cathérine's musical soiree (uncredited)
Agda Helin
— skips Nordström's old woman (uncredited)
Tom Walter
— The Police Spy (uncredited)
Torsten Lilliecrona
— lackey to von Wismar, guards Rehusen and Riddercrantz (uncredited)
Sven Magnusson
— Lackey at von Wismar's (uncredited)
Nils Nordståhl
— lackey at von Wismar's (uncredited)
Georg Årlin
— the chaplain at Cathérine's music soiree (uncredited)
Anna Olin
John Melin
Manne Grünberger
Gunnar Collin
