Director/a
Roger Corman
DIRECTOR/A
Reparto (por orden de créditos)
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
Paul Harber
Floyd Mason
Karen Kadler
Ellen Peters
Charles B. Griffith
Dr. Pete Shelton
Marshall Bradford
U.S. Secretary Platt
Thomas E. Jackson
George Haskell
David McMahon
Gen. Carpenter
Jim Knight
Bazooka Soldier
Paul Blaisdell
The Monsteruncredited