- Unknown:
- Val Gielgud
- Production By:
- Val Gielgud
- Brig.-Gen. Lambert, cm.g.:
- George Hagan
- Capt Stanley Graves:
- Jon Rollason
- A secretary:
- Eva Stuart
- Wing-Cdr Sidney Satterthwaite:
- Alban Blakelock
- Major Gerald Craven, D S O:
- Sebastian Shaw
- Dr Justinus van Galen:
- Wilfred Babbage
- Jean Ravaillac:
- Douglas Storm
- Corporal Albert Pym:
- Jeffrey Segal
- Betty Sanders:
- Valerie White
- Virginia Lawrence:
- Penelope Lee
- Political Commissar Sergei Grekoff:
- Felix Felton
- Colonel Ivan Roudenko:
- Bill Horsley
- Adela Rubinstein:
- Mary O'Farrell
- Jadwiga Konska:
- Gisela Birke
- Issachar Ben-Menahem:
- Alan Tilvern
- David Gottlieb:
- Kenneth Dight