 | Jeff Morrow als Dr. Leslie Gaskell |
 | Barbara Lawrence als Vera Hunter |
 | George O'Hanlon als Dr. Arnold Culver |
 | John Emery als Dr. Hubbell Eliot |
 | Morris Ankrum als Dr. Albert Stern |
 | Kenneth Alton als McCrary - The Pickup Driver |
 | Jose Gonzales-Gonzales als Manuel Ramirez |
| Robert Forrest als KGTK-TV Newscaster |
| Baxter Ward als Second Newscaster |
 | John Halloran als Lab Central Security Guard |
| Marjorie Stapp als Nurse |
 | John Parrish als Gen. Perry |
| Don Eitner als Air Force Meteorology Sergeant |
| Ron Kennedy als Air Force Control Tower Sergeant |
| Gordon Mills als Sergeant |
| Rosa Turich als Manuel's Wife |
 | Robert Shayne als Air Force General |
 | Richard Harrison als Pilot |
| Kurt Neumann | Director |
| Lawrence L. Goldman | Screenplay |
| Irving Block | Story |
| E.J. Baumgarten | Executive Producer |
| Irving Block | Producer |
| Louis DeWitt | Producer |
| Kurt Neumann | Producer |
| Jack Rabin | Producer |
| Paul Sawtell | Original Music Composer |
| Bert Shefter | Original Music Composer |
| Karl Struss | Director of Photography |
| Jodie Copelan | Editor |
| Theobold Holsopple | Production Design |
| Chester L. Bayhi | Set Decoration |
| Walter M. Scott | Set Decoration |
| Jack Rabin | Special Effects |
| Irving Block | Special Effects |
| Louis de Witt | Special Effects |
| Menrad von Mulldorfer | Special Effects |
| William Reinhold | Special Effects |
| Gene Warren | Special Effects |
| James Mobley | Sound |
| Max Goldman | Property Master |
| Louis Hippe | Makeup Artist |
| Nadine Denks | Hairstylist |
| Richard Staub | Wardrobe Supervisor |
| Mary Tate | Wardrobe Supervisor |
| Herbert E. Mendelson | Production Manager |
