Full Cast
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Lee Van Cleef
Dr. Tom Anderson
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Beverly Garland
Claire Anderson
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Peter Graves
Dr. Paul Nelson
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Sally Fraser
Joan Nelson
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Russ Bender
General James Pattick
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Jonathan Haze
Pvt. Miguel Ortiz
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Dick Miller
Sgt. Neil
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Paul Harbor
Floyd Mason
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Charles B. Griffith
Dr. Pete Shelton
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Karen Kadler
Ellen Peters
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Taggart Casey
Sheriff N.J. Shallert
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Thomas E. Jackson
George Haskell
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Marshall Bradford
U.S. Secretary Platt
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David McMahon
Gen. Carpenter
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Paul Blaisdell
The Monster (uncredited)
