Cast & crew
X: The Unknown (1956)
Directed by Leslie Norman Written by Jimmy Sangster
Cast
| Anthony Newley | LCpl. 'Spider' Webb |
| John Harvey | Maj. Cartwright |
| Peter Hammond | Lt. Bannerman |
| Kenneth Cope | Pvt. Lansing |
| Michael Ripper | Sgt. Harry Grimsdyke |
| Ian MacNaughton | Pvt. Haggis |
| Michael Brooke | Willie Harding |
| Frazer Hines | Ian Osborn |
| Neil Wilson | Russell |
| Stella Kimball | Willie's Nurse |
| Norman MacOwan | Old Tom |
| Brown Derby | The Vicar |
| Edwin Richfield | Soldier Burned on Back |
| John Stone | Gerry |
| Anthony Sagar | Rear Gate Night Watchman |
| Archie Duncan | Sgt. Yeardye |
| William Lucas | Peter Elliott |
| Dean Jagger | Dr. Adam Royston |
| Leo McKern | Inspector McGill |
| Edward Chapman | John Elliott |
| Jameson Clark | Jack Harding |
| Jane Aird | Vi Harding |
| Neil Hallett | Harry, the amorous intern |
| Marianne Brauns | Zena, the amorous nurse |
| Max Brimmell | Hospital Superintendant |
| Lawrence James | Gerard |
| Frank Taylor | Constable Williams |
| John Stirling | Police Car Driver |
| Jack Lambert | Police Sergeant |
Crew
| Leslie Norman | Director |
| Jimmy Sangster | Screenplay |
| Jimmy Sangster | Story |
| James Bernard | Original Music Composer |
| Gerald Gibbs | Director of Photography |
| Michael Carreras | Executive Producer |
| Anthony Hinds | Producer |
| James Needs | Editor |
| Philip Leakey | Makeup Effects |
| Jimmy Sangster | Production Manager |
| Jack Curtis | Special Effects |
| John Hollingsworth | Music Director |
| Len Harris | Camera Operator |
| Alfred Cox | Sound Editor |
| Molly Arbuthnot | Wardrobe Supervisor |
| Christopher Sutton | Assistant Director |
| Philip Leakey | Makeup Artist |
| Jock May | Sound Mixer |
| June Randall | Continuity |
| Edward Marshall | Art Direction |
| Mike Rutter | Clapper Loader |