Cast & crew
The 27th Day (1957)
Directed by William Asher Written by John Mantley
Cast
| Ralph Clanton | Ingram |
| Charles Bennett | Gorki |
| Arnold Moss | Behemoth Alien |
| Paul Frees | Newscaster |
| Paul Birch | Admiral Kelso |
| Theo Marcuse | Soviet |
| Monty Ash | Soviet |
| Marie Tsien | Tan Suit |
| Friedrich von Ledebur | Neuhaus |
| Irvin Ashkenazy | 2nd. Nazi |
| Philip Van Zandt | Taxi Racer |
| Peter Norman | Interrogator |
| Valerie French | Giles Wingate |
| Gene Barry | Dick Clark |
| John Bleifer | FBI Spokesman |
| Mel Welles | Marshal |
| Azemat Janti | Ivan or Psoltõ |
| David Bond | Schmidt |
| George Voskovec | Klaus Graversen |
| Stefan Schnabel | Soviet |
| Azemat Janti | Ivan Godofsky |
| Gene Barry | Jonathan Clark |
| Valerie French | Eve Wingate |
| George Voskovec | Prof. Klaus Bechner |
| Stefan Schnabel | The Soviet General |
| Friedrich von Ledebur | Dr. Karl Neuhaus |
| Ralph Clanton | Mr Ingram |
| Monty Ash | Soviet Prison Physician |
| Marie Tsien | Su Tan |
| Charles Bennett | Gorki |
| John Bleifer | Spokesman |
| Arnold Moss | The Alien |
| Theo Marcuse | Soviet Col. Gregor |
| Paul Birch | Admiral |
| Paul Frees | Radio Newscaster Ward Mason |
| Irvin Ashkenazy | 2nd Man |
| David Bond | Dr. Schmidt |
| Peter Norman | Interrogator |
| Philip Van Zandt | Taxi Driver |
| Mel Welles | Russian Marshal |
Crew
| John Mantley | Screenplay |
| Henry Freulich | Director of Photography |
| Lewis J. Rachmil | Executive Producer |
| Will Sheldon | Second Unit |
| Ross Bellah | Art Direction |
| Mischa Bakaleinikoff | Original Music Composer |
| Frank Tuttle | Set Decoration |
| Ferrol Redd | Sound Director |
| Helen Ainsworth | Producer |
| William Asher | Director |
| Ray Harryhausen | Special Effects |
| Jerome Thoms | Editor |
| John Mantley | Novel |
| Henry Freulich | Director of Photography |
| Ross Bellah | Art Direction |
| Ferrol Redd | Sound Director |
| Ray Harryhausen | Special Effects |
| John Mantley | Screenplay |
| William Asher | Director |
| Mischa Bakaleinikoff | Original Music Composer |
| Lewis J. Rachmil | Executive Producer |
| Frank Tuttle | Set Decoration |
| Will Sheldon | Second Unit |
| Helen Ainsworth | Producer |
| John Mantley | Novel |
| Jerome Thoms | Editor |