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.
Henry Hite
Phil Morton
Lois Brooks
Rork Stevens
Robert Simons
Peter M. Thompson
June Travis
George Perry
Aviva Crane
Stu Taylor
Barry Hopkins
Del Clark
Art Scott
Leonard Holstein
Dean Tompis
Jim Bassler
Rick Paul
Lorri Perry
Bill Rebane