AllMovie

Project X, an experimental nuclear reactor located just outside of Metropolis, runs out of control and threatens the city and the surrounding area for 100 miles around with a devastating radioactive explosion. Superman (George Reeves) arrives barely in time and shuts the reactor down, but in the process absorbs a deadly level of radiation -- he's invulnerable to its effects, but he is now a deadly danger to every living thing around him. The Man of Steel is forced into exile in a remote mountain cabin, while the world's scientists try to find a way to neutralize the radiation permeating his body. Reporters Lois Lane (Noel Neill) and Jimmy Olsen (Jack Larson) are as upset as everyone else about this tragic loss to the world, but are also puzzled and alarmed by the absence of Clark Kent who has informed the Daily Planet that he may be away for a while -- and possibly longer -- ostensibly following up a lead. Meanwhile, the criminal element in Metropolis is newly emboldened, not least of all Mr. Regan (Phil Van Zandt), a hood who had been put on to a priceless shipment of jewels being brought in from overseas. But to ensure that Superman won't interfere with the robbery, he takes Lois Lane hostage on the getaway plane. Can the Man of Steel find a way to save her life, before it's too late?