| Person | Type | Job | Role(s) |
|---|---|---|---|
 Basil Mason | Crew | Writing | Adaptation |
Eric Maschwitz | Crew | Writing | Novel |
Geoffrey Goodheart | Crew | Sound | Music Director |
Günther Krampf | Crew | Crew | Cinematography, Director of Photography |
Hugh Perceval | Crew | Production | Production Supervisor |
John Cox | Crew | Sound | Sound Recordist |
R. Holmes Paul | Crew | Art | Art Direction |
Reginald Beck | Crew | Editing | Editor |
 Reginald Denham | Crew | Directing | Director |
 Val Gielgud | Crew | Writing | Novel |
Ord Hamilton | Crew | Sound | Original Music Composer |
Vincent Permane | Crew | Directing | Assistant Director |
Colin Becke | Crew | Costume & Make-Up | Costume Design |
 Arthur Hambling | Cast | Actor | Man on BBC Reception Desk (uncredited) |
 Austin Trevor | Cast | Actor | Leopold Dryden |
 Betty Ann Davies | Cast | Actress | Poppy Levine |
 Bruce Lester | Cast | Actor | Peter Ridgwell (uncredited) |
Cecil Bevan | Cast | Actor | Police Doctor (uncredited) |
 Donald Wolfit | Cast | Actor | Sydney Parsons |
George De Warfaz | Cast | Actor | Foreigner (uncredited) |
 Gordon McLeod | Cast | Chief Commissioner | |
 Henry Kendall | Cast | Actor | Rodney Fleming |
 Howard Douglas | Cast | Actor | Weisskopf (uncredited) |
 Ian Hunter | Cast | Actor | Detective Inspector Gregory |
 Ivor Barnard | Cast | Actor | Joseph Higgins (uncredited) |
 Jack Hawkins | Cast | Actor | Herbert Evans |
Lilian Oldland | Cast | Actress | Joan Dryden |
Percival Mackey | Cast | Actor | Percival Mackey |
Percy Rhodes | Cast | Wife's Lover on Broadcast (uncredited) | |
 Peter Haddon | Cast | Actor | Guy Bannister |
 Robert Rendel | Cast | Actor | Sir Herbert Farquharson |
Val Gielgud | Cast | Actor | Julian Caird |
Vincent Holman | Cast | Actor | Detective (uncredited) |
Elisabeth Welch | Cast | Actress | Elisabeth Welch |
Hannen Swaffer | Cast | Hannen Swaffer | |
Vernon Bartlett | Cast | Vernon Bartlett | |
Eric Dunstan | Cast | Eric Dunstan | |
Gillie Potter | Cast | Gillie Potter | |
Eve Becke | Cast | Eve Becke | |
| Person | Type | Job | Role(s) |
