Dirigida por | |||
| Gordon Douglas | |||
Créditos del guión | ||
| Ted Sherdeman | (guión) | |
| Russell S. Hughes | (adaptación) (como Russell Hughes) | |
| George Worthing Yates | (argumento) | |
| James Whitmore | ... | Police Sgt. Ben Peterson | |
| Edmund Gwenn | ... | Dr. Harold Medford | |
| Joan Weldon | ... | Dr. Patricia 'Pat' Medford | |
| James Arness | ... | Robert Graham | |
| Onslow Stevens | ... | Brig. Gen. Robert O'Brien | |
| Sean McClory | ... | Maj. Kibbee | |
| Chris Drake | ... | Trooper Ed Blackburn | |
| Sandy Descher | ... | The Ellinson Girl | |
| Mary Alan Hokanson | ... | Mrs. Lodge (como Mary Ann Hokanson) | |
| Don Shelton | ... | Trooper Capt. Fred Edwards | |
| Fess Parker | ... | Alan Crotty | |
| Olin Howland | ... | Jensen (como Olin Howlin) | |
| listado alfabético del resto del reparto: | |||
| Marshall Bradford | ... | Psychiatrist (escenas borradas) | |
| Richard Bellis | ... | Mike Lodge (sin acreditar) | |
| John Beradino | ... | Patrolman Ryan (sin acreditar) | |
| Robert Berger | ... | Patrolman Sutton (sin acreditar) | |
| Oscar Blanke | ... | Alcoholic Ward Patient (sin acreditar) | |
| Willis Bouchey | ... | Official at D.C. Meeting (sin acreditar) | |
| Richard Boyer | ... | Trooper #1 (sin acreditar) | |
| Waldron Boyle | ... | Doctor (sin acreditar) | |
| Alexander Campbell | ... | Official (sin acreditar) | |
| James Cardwell | ... | Oficial (sin acreditar) | |
| Roydon Clark | ... | Jeep Driver (sin acreditar) | |
| John Close | ... | Johnny, Police Aircraft Pilot (sin acreditar) | |
| Booth Colman | ... | Reportero (sin acreditar) | |
| James Conaty | ... | Washington Official (sin acreditar) | |
| Robert Scott Correll | ... | Jerry Lodge (sin acreditar) | |
| Walter Coy | ... | Reportero (sin acreditar) | |
| Dean Cromer | ... | MP Sergeant (sin acreditar) | |
| Richard Deacon | ... | Bald reporter, Los Angeles news conference (sin acreditar) | |
| Eddie Dew | ... | Oficial (sin acreditar) | |
| Lawrence Dobkin | ... | Los Angeles City Engineer (sin acreditar) | |
| Ann Doran | ... | Child Psychiatrist (sin acreditar) | |
| Wally Duffy | ... | Airman (sin acreditar) | |
| Cliff Ferre | ... | Cliff, Police Lab Man (sin acreditar) | |
| Norman Field | ... | Gen. James (sin acreditar) | |
| Joseph Forte | ... | Coroner Putnam (sin acreditar) | |
| Dean Fredericks | ... | Det. Curtis (sin acreditar) | |
| Russell Gaige | ... | Coroner (sin acreditar) | |
| Otis Garth | ... | Admiral at Second Conference (sin acreditar) | |
| Dorothy Green | ... | Matron (sin acreditar) | |
| Mary Lou Holloway | ... | Blonde (sin acreditar) | |
| Gayle Kellogg | ... | Gunner (sin acreditar) | |
| Kenner G. Kemp | ... | Trooper #2 (sin acreditar) | |
| Hubie Kerns | ... | Jeep Driver (sin acreditar) | |
| Warren Mace | ... | Radio Operator (sin acreditar) | |
| Chad Mallory | ... | Loader (sin acreditar) | |
| John Maxwell | ... | Dr. Grant (sin acreditar) | |
| Matthew McCue | ... | Gramps Johnson, Storekeeper (sin acreditar) | |
| Charles Meredith | ... | Washington Official (sin acreditar) | |
| Forbes Murray | ... | Government Official (sin acreditar) | |
| Leonard Nimoy | ... | Air Force Sergeant (sin acreditar) | |
| Jack Perrin | ... | Army Officer (sin acreditar) | |
| Charles Perry | ... | Soldado (sin acreditar) | |
| Grandon Rhodes | ... | Alcoholic Ward Doctor (sin acreditar) | |
| William Schallert | ... | Ambulance Attendant (sin acreditar) | |
| Fred Shellac | ... | Attendant (sin acreditar) | |
| Joel Smith | ... | Smitty, Ben's Jeep Driver (sin acreditar) | |
| K.L. Smith | ... | Trooper (sin acreditar) | |
| Janet Stewart | ... | WAVE (sin acreditar) | |
| Victor Sutherland | ... | Senator at D.C. Meeting (sin acreditar) | |
| Dub Taylor | ... | Railroad Yard Watchman (sin acreditar) | |
| Harry Tyler | ... | Harry, Alcoholic Ward Patient (sin acreditar) | |
| Dick Wessel | ... | Railroad Detective (sin acreditar) | |
| Harry Wilson | ... | Alcoholic Ward Patient (sin acreditar) | |
Producida por | |||
| David Weisbart | .... | productor | |
Música original por | |||
| Bronislau Kaper | |||
Fotografía por | |||
| Sidney Hickox | (como Sid Hickox) | ||
Montaje por | |||
| Thomas Reilly | |||
Dirección Artística por | |||
| Stanley Fleischer | |||
Decoración del Escenario por | |||
| G.W. Berntsen | |||
Departamento de maquillaje | |||
| Gordon Bau | .... | maquillaje | |
Ayudante de dirección | |||
| Russell Saunders | .... | asistente del director (como Russ Saunders) | |
Departamento de sonido | |||
| Francis J. Scheid | .... | sonido | |
Dobles | |||
| Roydon Clark | .... | dobles (sin acreditar) | |
Departamento de vestuario | |||
| Moss Mabry | .... | vestuario | |
Departamento de Música | |||
| Robert Franklyn | .... | orquestador | |
| Ray Heindorf | .... | director musical | |
Otros miembros del equipo | |||
| Liz Patten | .... | doble: Sandy Descher (sin acreditar) | |
| Créditos de la compañía | Especificaciones Técnicas | Detalles principales |