The Magnetic Monster

The Magnetic Monster is a 1953 independently made blackandwhite science fiction film released by United Artists, produced by Ivan Tors and George Van Marter, directed by Curt Siodmak and uncredited Herbert L. Strock, and starring Richard Carlson, King Donovan, and Jean Byron.

A pair of agents from the Office of Scientific Investigation OSI, Dr. Jeffrey Stewart Richard Carlson and Dr. Dan Forbes King Donovan are sent to investigate a local appliance store. All of the stores clocks have stopped at the same time, while metal items in the store have become magnetized. A source for this is traced to an office located directly above the store, where various scientific equipment is found, along with a dead body. There are also signs of radioactivity, but the exact cause of the stores anomalies is clearly no longer in the room or even in the immediate area.Investigation and a request for citizen input eventually leads to an airline flight carrying a scientist, Dr. Howard Denker Leonard Mudie, who has developed signs of radiation sickness related to something he is carrying in a heavy briefcase and which he clutches irrationally. Before dying, he confesses to experimenting with an artificial radioactive isotope, serranium, which he had bombarded with alpha particles for 200 hoursdays andhours. Unfortunately, his sofar microscopic creation has taken on a life of its own the new isotope must absorb energy from its surroundings everyhours in the process it doubles its size and mass each time, releasing deadly radiation and incredibly intense magnetic energy. ........

Source: Wikipedia