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.
Richard Carlson
King Donovan
Leo Britt
Jean Byron
Harry Ellerbe
Frank Gerstle
John Vosper
Byron Foulger
Leonard Mudie
Kathleen Freeman
William Benedict
John Zaremba
Douglas Evans
Strother Martin
Michael Fox
Watson Downs
Lee Phelps
Roy Engel
John Dodsworth
Charles Williams
Michael Granger
Jarma Lewis
Elizabeth Root
Juney Ellis