Robert Donat (Capt. Terence Stevenson)
Valerie Hobson (Maruschka)
Glynis Johns (Paula Palacek)
Walter Rilia (Inspector Otto Vogel)
Phyllis Morris (Anna Palacek)
David Ward
Victor Weske
Frederick Richter (Nestor)
J. Hubert Leslie
Miki Iveria
Percy Walsh (Dr. Willendorf)
John Penrose (Lt. Krantz)
Martin Miller (Dr. Novothy)
Anthony Eustrel (Officer)
Mabel Terry-Lewis (Mrs. Stevenson)