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.
Cast
Richard Carlson
Dr. Jeffrey Stewart
King Donovan
Dr. Dan Forbes
Leo Britt
Dr. Benton
Jean Byron
Connie Stewart
Harry Ellerbe
Dr. Allard
Frank Gerstle
Col. Willis
John Vosper
Capt. Dyer
Byron Foulger
Mr. Simon
Leonard Mudie
Howard Denker
Kathleen Freeman
Nelly
William Benedict
Albert
John Zaremba
Chief Watson
Douglas Evans
Pilot
Strother Martin
Co-Pilot
Michael Fox
Dr. Serny
Watson Downs
Mayor
Lee Phelps
City Engineer
Roy Engel
Gen. Behan
John Dodsworth
Dr. Carthwright
Charles Williams
Cabbie
Michael Granger
Kenneth Smith
Jarma Lewis
Stewardess
Elizabeth Root
Joy
Juney Ellis
Spinster
Crew
Curt Siodmak
Director, Screenplay
Herbert L. Strock
Director, Supervising Editor
Ivan Tors
Screenplay, Producer
Charles Van Enger
Director of Photography
Richard Dixon
Assistant Director
George Van Marter
Associate Producer, Production Design, Art Direction
Maxwell O. Henry
Second Unit Director
Bill Naylor
Sound Effects
Howard Fogetti
Sound
Harry Redmond Jr.
Special Effects
Jack R. Glass
Visual Effects
Paul Beaver
Original Music Composer
Blaine Sanford
Original Music Composer
Victor A. Gangelin
Set Decoration
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