London, England, during World War II. After living a tragic life experience, young Violette Szabo joins the Special Operations Executive and crosses the German enemy lines as a secret agent to aid a French Resistance group.
| Actor | Role |
|---|---|
 Virginia McKennaViolette Szabo | Violette Szabo |
 Paul ScofieldTony Fraser | Tony Fraser |
 Jack WarnerMr. Bushell | Mr. Bushell |
 Denise GreyMrs. Bushell | Mrs. Bushell |
 Maurice RonetJacques | Jacques |
 Alain SauryÉtienne Szabo | Étienne Szabo |
 Avice LandoneVera Atkins | Vera Atkins |
| AAnne LeonLillian Rolfe | Lillian Rolfe |
 Nicole StéphaneDenise Bloch | Denise Bloch |
 Bill OwenNCO Instructor | NCO Instructor |
 Sydney TaflerPotter | Potter |
 Noel WillmanInterrogator | Interrogator |
 Billie WhitelawWinnie | Winnie |
 William MervynColonel Buckmaster | Colonel Buckmaster |
 Michael GoodliffeCoding Expert | Coding Expert |
 André MaranneGarage Man | Garage Man |
 Harold LangCommandant Suhren | Commandant Suhren |
 Nigel HawthornePark Soldier (uncredited) | Park Soldier (uncredited) |
 Michael CaineTrain Prisoner (uncredited) | Train Prisoner (uncredited) |