 | Grant Williams als Dave Miller |
 | Lola Albright als Cathy Barrett |
 | Les Tremayne als Martin Cochrane |
 | Trevor Bardette als Prof. Arthur Flanders |
 | William Flaherty als Police Chief Dan Corey |
 | Harry Jackson als Dr. Steve Hendricks |
 | Richard H. Cutting als Dr. E.J. Reynolds |
| Linda Scheley als Ginny Simpson |
| Dean Cromer als Highway Patrolman |
 | Steve Darrell als Joe Higgins |
 | Paul Petersen als Bobby |
 | William Schallert als Weatherman |
 | Phil Harvey als Ben Gilbert |
 | Troy Donahue als Hank Jackson |
 | Carol Morris als Nurse 1 |
 | Claudia Bryar als Mrs. Simpson |
| Ezelle Poule als Ethel |
| Ellis W. Carter | Director of Photography |
| Robert M. Fresco | Story |
| Robert M. Fresco | Screenplay |
| Jack Arnold | Story |
| John Sherwood | Director |
| Norman Jolley | Screenplay |
| Patrick McCormack | Editor |
| Howard Christie | Producer |
| Clifford Stine | Visual Effects |
| Bud Westmore | Makeup Artist |
| Marilyn Sotto | Costume Design |
| Frank Brendel | Special Effects |
| Irving Gertz | Original Music Composer |
| William P. Tapp | Set Decoration |
| Alexander Golitzen | Art Direction |
| Henry Mancini | Original Music Composer |
| Robert Emmet Smith | Art Direction |
| Russell A. Gausman | Set Decoration |
| Herman Stein | Original Music Composer |
| Robert Pierce | Assistant Camera |
| Harry L. Underwood | Camera Operator |
| Rollie Lane | Still Photographer |
| Leslie I. Carey | Sound |
| Frank H. Wilkinson | Sound |
| Joseph E. Kenney | Assistant Director |
| Joseph Gershenson | Music Supervisor |
| Bob Herron | Stunts |
