State Secret (1950) — Cast
Cast
| Henrik Jacobsen | Mountain |
| Arsene Kirilloff | Vilnik |
| Eric Pohlmann | Cable Hogue |
| Therese Van Kye | Robinson |
| Danny Green | Taxi Racer |
| Marianne Deeming | Sophie |
| Ian Wallace | Butler |
| Alessandro Tasca | Radio Commentator |
| Jack Hawkins | Colonel |
| Martin Boddey | Clubman |
| Peter Illing | Macco |
| Leslie Linder | Count Andre |
| Pat Neal | Sister Louie |
| Gordon Tanner | Joe |
| Glynis Johns | Robinson |
| Russell Waters | Clubman |
| Robert Ayres | Cool Buckman |
| Leo Bieber | Box |
| Gerik Schjelderup | Bartorek |
| Louis Wiechert | Johann Christian Lenz |
| Joe Wadham | Stage Actor |
| Karl Stepanek | Dr Chaleck |
| Richard Marner | Police Officer |
| Leonard Sachs | Dr Chaleck |
| Robert Cawdron | Policeman |
| Arthur Reynolds | Compere |
| Olga Lowe | Robinson |
| Douglas Fairbanks Jr. | Philip Marlowe |
| Arthur Howard | Clubman |
| Gerard Heinz | Tomasi |
| Anton Diffring | Police Officer |
| Guido Lorraine | Prachi |
| Paul Demel | Barber |
| Arthur Skinner | Background |
| Howard Douglas | Clubman |
| Hans Olaf Moser | Sigrist |
| Alexis Chesnakov | Francks |
| Herbert Lom | Karl |
| Richard Molinas | Red |
| Walter Rilla | Niva |
| Carl Jaffe | Janovic |
| Nelly Arno | Barber |
Crew
| Robert Krasker | Director of Photography |
| Lee Doig | Sound Editor |
| William Alwyn | Original Music Composer |
| Cyril Coke | Producer's Assistant |
| Leslie Gilliat | Production Manager |
| Derek Armstrong | Assistant Editor |
| Alan Allen | Sound Recordist |
| Ivy Baker | Costume Design |
| Beatrice Dawson | Costume Design |
| Paddy Arnold | Continuity |
| Sidney Gilliat | Producer |
| John Hawkesworth | Assistant Art Director |
| Kenneth McCallum Tait | Assistant Art Director |
| Guy Hamilton | Assistant Director |
| Gerry Fisher | Assistant Camera |
| Wilfred Shingleton | Art Direction |
| Michael Morris | Makeup Artist |
| Waleen Whitworth | Hairdresser |
| Frank Launder | Producer |
| Roy Huggins | Novel |
| Edward Scaife | Camera Operator |
| Sidney Gilliat | Screenplay |
| Muir Mathieson | Conductor |
| Sidney Gilliat | Director |
| Thelma Myers | Editor |