X: The Unknown 68 years old
It rises from 2000 miles below the earth to melt everything in it's path!
When a fissure explosively opens in an English mud flat during a military exercise, injuring one soldier and killing another, an American research scientist at a nearby nuclear plant joins with a British investigator to discover why the victims were radioactively burned and why, shortly thereafter, a series of radiation-related incidents are occurring in an ever-growing straight line away from the fissure.
Credits
X: The Unknown Cast
| Name | Character |
|---|---|
| Leo McKern He was 37, 82 years old when he died | as Inspector McGill |
| Dean Jagger He was 53, 87 years old when he died | as Dr. Adam Royston |
| Anthony Newley He was 25, 67 years old when he died | as LCpl. 'Spider' Webb |
| Edward Chapman He was 55, 75 years old when he died | as John Elliott |
| William Lucas He was 32, 91 years old when he died | as Peter Elliott |
| Jameson Clark He was 49, 77 years old when he died | as Jack Harding |
| Norman Macowan | as Old Tom |
| Marianne Brauns | as Zena, the Nurse |
| Kenneth Cope He was 26, now 93 years old | as Pvt. Lansing |
| Neil Hallett He was 32, 80 years old when he died | |
| Peter Hammond He was 33, 87 years old when he died | as Lt. Bannerman |
| Robert Bruce | as Dr. Kelly |
| Michael Ripper He was 44, 87 years old when he died | as Sgt. Harry Grimsdyke |
| Neil Wilson He was 21, 3 years old when he died | as Russell |
| Michael Brooke He was 15, 72 years old when he died | as Willie Harding |
| Edwin Richfield He was 35, 68 years old when he died | as Soldier Burned on Back |
| Ian MacNaughton He was 31, 76 years old when he died | as Pvt. Haggis |
X: The Unknown Crew
| Name | Department |
|---|---|
| Edward Marshall as Art Direction. He was 359 (77) years old when He died | Art |
| Molly Arbuthnot as Wardrobe Supervisor. She was 48 (92) years old when She died | Costume & Make-Up |
| Alfred Cox as Sound Editor. He was 131 (85) years old when He died | Sound |
| Philip Leakey as Makeup Artist. He was 7 (now 75) years old | Costume & Make-Up |
| Philip Leakey as Makeup Effects. He was 7 (now 75) years old | Crew |
| Leslie Norman as Director. She was 46 (81) years old when She died | Directing |
| Michael Carreras as Executive Producer. He was 29 (66) years old when He died | Production |
| James Bernard as Original Music Composer. He was 31 (75) years old when He died | Sound |
| Anthony Hinds as Producer. He was 34 (91) years old when He died | Production |
| James Needs as Editor. He was 38 (84) years old when He died | Editing |
| Jimmy Sangster as Production Manager. He was 29 (83) years old when He died | Production |
| Jimmy Sangster as Screenplay. He was 29 (83) years old when He died | Writing |
| Jimmy Sangster as Story. He was 29 (83) years old when He died | Writing |
| Joseph Losey as Director. He was 48 (75) years old when He died | Directing |
| Gerald Gibbs as Director of Photography. He was 49 (82) years old when He died | Camera |
| Len Harris as Camera Operator. He was 12 (now 81) years old | Camera |
| Jock May as Sound Mixer. | Sound |
X: The Unknown (68 years)
It rises from 2000 miles below the earth to melt everything in it's path!
- Release day: Friday, September 21, 1956
- Runtime: 81 minutes