Directed by
| Roger Corman | ||
Writing Credits
| Lou Rusoff | ... | (screenplay) |
| Charles B. Griffith | ... | (uncredited) |
Cast (in credits order) verified as complete
| Peter Graves | ... | Dr. Paul Nelson | |
| Beverly Garland | ... | Claire Anderson | |
| Lee Van Cleef | ... | Dr. Tom Anderson | |
| Sally Fraser | ... | Joan Nelson | |
| Russ Bender | ... | Brig. Gen. James Pattick | |
| Jonathan Haze | ... | Pvt. Manuel Ortiz | |
| Dick Miller | ... | Sgt. Neil | |
 |
Taggart Casey | ... | Sheriff N.J. Shallert |
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Paul Harber | ... | Floyd Mason |
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Karen Kadler | ... | Ellen Peters (as Karyne Kadler) |
| Charles B. Griffith | ... | Dr. Pete Shelton (as Charles Griffith) | |
| Marshall Bradford | ... | U.S. Secretary Platt (as Marshal Bradford) | |
| Thomas E. Jackson | ... | George Haskell (as Tom Jackson) | |
| David McMahon | ... | Gen. Carpenter | |
| Rest of cast listed alphabetically: | |||
|
|
Jim Knight | ... | Bazooka Soldier |
| Paul Blaisdell | ... | The Monster (uncredited) | |
Produced by
| Samuel Z. Arkoff | ... | executive producer (uncredited) |
| Roger Corman | ... | producer |
| James H. Nicholson | ... | executive producer (as James Nicholson) |
Music by
| Ronald Stein | ||
Cinematography by
| Frederick E. West | ... | (as Fred E. West) (photography) |
Editing by
| Charles Gross Jr. | ... | (as Charles Gross) |
Makeup Department
| Larry Butterworth | ... | makeup artist |
Production Management
| Lou Place | ... | production manager |
Art Department
| Karl Brainard | ... | property master |
Sound Department
| Jay Ashworth | ... | sound |
| Philip Mitchell | ... | sound (uncredited) |
| Al Overton | ... | sound (uncredited) |
Special Effects by
| Paul Blaisdell | ... | special effects (uncredited) |
Music Department
| Jerry Irvin | ... | music editor |
Additional Crew
| Bob Burns | ... | assistant: Paul Blaisdell (uncredited) |
