Terror swoops through the heart of a city in the dead of night!
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.
Curt Siodmak
Director
Herbert L. Strock
Director

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
Crack in the World58%
Invaders from Mars59%
X: The Unknown61%
The Fantastic 4: First Steps70%
Monsters vs Aliens62%
WALL·E81%
The Incredible Shrinking Man74%
Earth to Echo59%
Bride of Frankenstein75%
6559%
Elio69%
Ultraman: Rising80%
The Blob62%
Titan A.E.66%
Star Trek III: The Search for Spock65%
Fantastic Four58%
Alien Abduction58%
Space/Time58%
When Dinosaurs Ruled the Earth61%
Star Trek II: The Wrath of Khan74%