Synopsis
A rogue scientist near a small desert town arouses the suspicion of the town's doctor when his lab assistant is found dead from a case of acromegaly, which took only four days to develop. As the doctor investigates, aided by the scientist's new female assistant, they discover that something is devouring local cattle and humans in increasingly large quantities.
Cast

John Agar
Dr. Matt Hastings

Mara Corday
Stephanie 'Steve' Clayton

Leo G. Carroll
Prof. Gerald Deemer

Nestor Paiva
Sheriff Jack Andrews

Ross Elliott
Joe Burch

Hank Patterson
Josh

Eddie Parker
Paul Lund / Eric Jacobs / Airport Workman

Bert Holland
Barney Russell

Raymond Bailey
Dr. Townsend

Steve Darrell
Andy Andersen
Edwin Rand
Lt. John Nolan
Wag Blesing
Townsman

Clint Eastwood
Jet Squadron Leader (uncredited)
Dee Carroll
Telephone Operator (uncredited)
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