 |
George Cole as George Archibald Potts |
 |
Oskar Homolka as Zekov |
 |
Nadia Gray as Tania |
 |
Wilfrid Hyde-White as Sir Hubert Wells |
 |
Richard Wattis as Barnes |
 |
Irene Handl as Mrs. Tidmarsh |
 |
Christopher Lee as Russian Agent (uncredited) |
 |
Frederick Leister as Prime Minister |
 |
Frederick Valk as Rakov |
 |
Geoffrey Sumner as Pike |
 |
Ronald Adam as Barworth Controller |
 |
Edwin Styles as Barworth Superintendent |
 |
Kynaston Reeves as Barworth Director |
 |
Ernest Jay as Professor Layton |
 |
Michael Medwin as Smedley |
 |
Henry Hewitt as Minister of Health |
|
Walter Horsbrugh as 1st Cabinet Minister |
|
Anthony Shaw as 2nd Cabinet Minister |
 |
Tim Turner as 1st Reporter |
 |
Gibb McLaughlin as Schoolmaster |
 |
Michael Balfour as Jersey Sailor |
 |
Hal Osmond as Jersey Waiter |
 |
Charles Goldner as Gaston |
 |
Ronnie Stevens as Aubrey |
 |
Eleanor Summerfield as Cecilia |
|
Phyllis Morris as Mrs. Tweedy |
|
Myrtle Reed as Jersey Air Hostess |
 |
Ina De La Haye as Madame |
 |
David Hurst as Deutsch |
|
Bernard Rebel as Trubiev |
 |
Olaf Pooley as Roblettski |
 |
Guido Lorraine as 1st M.V.D. |
 |
Terence Alexander as 2nd M.V.D. |
 |
Richard Marner as Russian Sentry |
 |
Martin Boddey as Russian Security Officer |
 |
Gerard Heinz as Russian Director of Plant |
|
Fred Berger as Russian Doctor |
 |
Victor Maddern as British N.C.O. |
|
Reed De Rouen as 1st U.S. Soldier |
|
Johnny Catcher as 2nd U.S. Soldier |
 |
Willoughby Gray as British Officer |
 |
Anton Diffring as Border Police GDR (uncredited) |
| Directing | Mario Zampi | Director |
| Writing | Jack Davies | Screenplay |
| Writing | Michael Pertwee | Screenplay |
| Sound | Stanley Black | Original Music Composer |
| Camera | Stanley Pavey | Director of Photography |
| Production | Mario Zampi | Producer |
| Editing | Giulio Zampi | Editor |
| Art | Ivan King | Art Direction |
