| Actor
|
Role
|
| Craig Stevens |
Colonel Joe Parkman
|
| William Hopper |
Doctor Nedrick "Ned" Jackson
|
| Alix Talton |
Marge Blaine
|
| Donald Randolph |
General Mark Ford
|
| Pat Conway |
Sergeant Pete Allen
|
| Florenz Ames |
Professor Anton Gunther
|
| Paul Smith |
Corporal, Parkman's clerk
|
| Phil Harvey |
Lou, radar man
|
| Floyd Simmons |
Army Sergeant
|
| Paul Campbell |
Lieutenant Fred Pizar
|
| Helen Jay |
Mrs. Farley
|
| Keith Aldrich |
Jerry - C47 co-pilot
|
| William Anders |
Sergeant - Archer control
|
| Marvin Bryan |
Machine gunner
|
| John Close |
Engineer
|
| Tom Cound |
Group Captain Hawkins
|
| William A. Forester |
Announcer
|
| Paul Frees |
Opening narrator
|
| Tom Greenway |
Second reporter
|
| James R. Haskin |
Civilian announcer
|
| Jess Kirkpatrick |
Father
|
| James Lanphier |
Colonel Harvey
|
| Harold Lee |
Greenland Eskimo chief
|
| Ned Le Fevre |
Announcer
|
| George Lynn |
Bus driver
|
| Jack Mather |
Officer
|
| David McMahon |
Captain Frank Carver
|
| Edward McNally |
Policeman
|
| Marvin Miller |
Narrator
|
| Madelon Mitchell |
Mother
|
| Ernesto Morelli |
Italian fisherman
|
| Sigurd Nilssen |
Professor Harvey Pierce
|
| Dick Paxton |
Plotter
|
| Bing Russell |
State trooper
|
| Harry Tyler |
Manhattan tunnel spectator
|
| Sumner Williams |
C47 pilot
|
| Michael Forest |
Photographer
|
