 | Alec Guinness als The Cardinal |
 | Jack Hawkins als The Interrogator |
 | Wilfrid Lawson als The Jailer |
 | Kenneth Griffith als The Secretary |
 | Jeanette Sterke als The Girl |
 | Ronald Lewis als The Guard |
 | Raymond Huntley als The General |
 | Mark Dignam als The Governor |
 | Gerard Heinz als The Doctor |
 | Percy Herbert als Soldier (uncredited) |
 | Oscar Quitak als Cafe Waiter (uncredited) |
| Denis Shaw als Plainclothesman (uncredited) |
| Peter Glenville | Director |
| Benjamin Frankel | Music |
| Bridget Boland | Writer |
| Frederick Wilson | Editor |
| Reginald H. Wyer | Director of Photography |
| Sydney Box | Executive Producer |
| Vivian Cox | Producer |
| John Hawkesworth | Art Direction |
| Julie Harris | Costume Design |
| W.T. Partleton | Makeup Artist |
| Douglas Peirce | Production Manager |
| Denis O'Dell | Assistant Director |
| Phyllis Crocker | Continuity |
