Leslie Howard

Character: Professor Horatio Smith

Francis L. Sullivan

Character: General von Graum

Mary Morris

Character: Ludmilla Koslowski

Hugh McDermott

Character: David Maxwell

Raymond Huntley

Character: Marx

Manning Whiley

Character: Bertie Gregson

Peter Gawthorne

Character: Sidimir Koslowski

Allan Jeayes

Character: Dr Benckendorf

Dennis Arundell

Character: Hoffman

Joan Kemp-Welch

Character: School-Teacher

Philip Friend

Character: Spencer

Laurence Kitchin

Character: Clarence Elstead

David Tomlinson

Character: Steve

Basil Appleby

Character: Jock MacIntyre

Percy Walsh

Character: Dvorak

Suzanne Clair

Character: Salesgirl

Roland Pertwee

Character: Embassy Official - Sir George Smith

Charles Paton

Character: Steinhof

Aubrey Mallalieu

Character: Dean

George Street

Character: Schmidt

Oriel Ross

Character: Lady Willoughby

Bryan Herbert

Character: Jaromir

Arthur Hambling

Character: Jordan

Ben Williams

Character: Graubitz

Ernest Butcher

Character: Weber

Mary Brown

Character: Girl Student

W. Phillip

Character: Innkeeper

Ilse Bard

Character: Gretchen

Ernest Verne

Character: German Officer

Hector Abbas

Character: Karl Meyer

Neal Arden

Character: Second Prisoner

Richard George

Character: Prison Guard

Roddy Hughes

Character: Zigor

Hugh Pryse

Character: Wagner

Michael Brennan

Character: Camp Guard with Lantern

Elwyn Brook-Jones

Character: Bit Part

Sebastian Cabot

Character: Bit Role

Peter Cozens

Character: Man

Arthur Denton

Character: Gestapo Man Following Smith

Irene Handl

Character: Bit Part

Vincent Holman

Character: Doctor at Diggings

Ronald Howard

Character: Minor Role

Stuart Latham

Character: Telephone Operator

Michael Rennie

Character: Prison Camp Officer

Charles Rolfe

Character: German Officer at Customs

John Slater

Character: Reporter

Harry Terry

Character: Camp Guard

A.E. Matthews

Character: Earl of Meadowbrook