Ray Milland as Ralph Denistoun

Marlene Dietrich as Lydia

Murvyn Vye as Zoltan

Bruce Lester as Richard Byrd

Dennis Hoey as Hoff

Quentin Reynolds as American Journalist

Reinhold Schünzel as Otto Krosigk

Ivan Triesault as Major Reimann

Hermine Sterler as Greta Krosigk

Leo Schlesinger as Soldier (uncredited)

Greta Ullmann as German Wife (uncredited)

Leslie Denison as Miggs (uncredited)

Larry Simms as Horace (uncredited)

Eric Feldary as Obersturmfuhrer Zweig (uncredited)

Robert R. Stephenson as SS Guard (uncredited)

Gisela Werbisek as German Dowager at Party (uncredited)

Harry Anderson as German Farmer (uncredited)

Gordon Arnold as Gypsy Boy (uncredited)

Ellen Baer as Gypsy Girl (uncredited)

Martha Bamattre as Wise Old Woman at the Krosigk's (uncredited)

Charles Bates as Gypsy Boy with Information (uncredited)

Carmen Beretta as Tourist (uncredited)

Louise Colombet as Flower Woman (uncredited)

Robert Cory as Burlington Club Doorman (uncredited)

Gwen Davies as Stewardess (uncredited)

Harold de Becker Jr. as Telegraph Boy (uncredited)

John Dehner as SS Officer with Hoff (uncredited)

Vernon Downing as Club Member with Reynolds (uncredited)

Tony Ellis as Dispatch Rider (uncredited)

Margaret Farrell as Minor Role (uncredited)

Arno Frey as Major (uncredited)

Frederick Giermann as Sergeant (uncredited)

Jon Gilbreath as Soldier (uncredited)

John Good as SS Lieutenant (uncredited)

Henry Guttman as Peasant (uncredited)

Maynard Holmes as Private (uncredited)

Stuart Holmes as Club Member with Reynolds (uncredited)

Frank Johnson as Waiter (uncredited)

Roberta Jonay as Farmer's Daughter (uncredited)

Julius Klein as Musician (uncredited)

Caryl Lincoln as Farmer's Wife (uncredited)

Howard M. Mitchell as Naval Officer (uncredited)

Antonia Morales as Gypsy Dancer (uncredited)

Fred Nurney as German Agent (uncredited)

Fred Nurney as Lieutenant Colonel (uncredited)

Pepito Pérez as Gypsy Boy (uncredited)

Otto Reichow as German Agent (uncredited)

Gordon Richards as Club Member with Denistoun (uncredited)

Walter Rode as Nazi Party Official (uncredited)

Henry Rowland as SS Trooper Pfeiffer (uncredited)

Catherine Savitsky as German Wife (uncredited)

Hans Schumm as Policeman (uncredited)

Peter Seal as Chief of Police (uncredited)

George Sorel as Policeman (uncredited)

Robert Val as Gypsy Boy (uncredited)

Hans von Morhart as SS Trooper (uncredited)

Henry Vroom as SS Guard (uncredited)

Jack Wilson as Hitler Youth Leader (uncredited)

Al Winters as SS Colonel (uncredited)

Jack Worth as Nazi Party Official (uncredited)

William Yetter Jr. as Soldier (uncredited)

William Yetter Sr. as German Peasant (uncredited)