The Office of Scientific Investigations tracks down the source of increased magnetism and radioactivity in Los Angeles, and discovers that a man-made isotope is consuming available energy from nearby mass every few hours, doubling its size in the process. Although microscopic, it will soon become big enough to destroy Earth; and how to stop it is yet to be determined. The film's Deltatron special effects footage is taken from the 1934 German sci-fi film GOLD.

• Ivan Tors Productions
• Richard Carlson
• King Donovan
• Leo Britt
• Jean Byron
• Harry Ellerbe
• Frank Gerstle
• John Vosper
• Byron Foulger