An astronaut went up- a "guess-what" came down!

American astronaut Frank Douglas mysteriously disappears from his spacecraft as it parachutes to Earth. He is apparently replaced by or turned into a large, radioactive, humanoid monster. A team of scientists and military men attempt to capture the monster.

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Main Cast: Henry Hite, Phil Morton, Lois Brooks, Rork Stevens, Robert Simons, Peter M. Thompson, June Travis, George Perry, Aviva Crane, Stu Taylor

Directors: Bill Rebane, Herschell Gordon Lewis

Writers: Jeff Smith, Dok Stanford, Bill Rebane

Editor:

Cinematographer: Frank Pfeiffer

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