The 27th Day (1957) — Cast
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 |
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 |