The best Marshall Reed’s science fiction movies

With his assistant, Laura Hutchinson (Kathryn Gant), Dr. David Conway (William Leslie) develops a device to advance the fledgling science of earthquake prediction. After forecasting a large trembleor that will rock California within twenty-four hours, Conway cannot persuade the Governor to act. When the prediction proves true and further tests indicate that there are more quakes to come, Conway and Laura seek to perfect their device. Subsequent tests deep within Carlsbad Caverns discover an unknown element—E-112—that is responsible for the earthquakes and threatens to destroy the globe if it ever reaches the surface. The team determines that with only four weeks until Armegddon, the race is on to neutralize the killer element before it takes a devastating toll.

It is 1865 and Union prisoners use a military balloon to escape a Southern prison camp near the end of the Civil War. The balloon drifts for days and finally lands on a mysterious volcanic island with very unusual inhabitants. Also landing, in a better aircraft, is Rulu, a visitor from Mercury. She seeks a radio-active material that will enable her to manufacture an explosive that will destroy the world or, at least, the portion known as Earth in this 15 Chapter Serial from the 1950s.

At the end of World War II, Nazi officials spirited the living head of Adolf Hitler out of Germany to a hiding place in the South American country of Mandoras, in order to revive the Third Reich at a later date. By the 1960s these men believe the time has come, so they kidnap a top scientist in order to force him to help keep Hitler alive. Several intelligence agencies find out about the plot and send agents to stop it. NOTE: "They Saved Hitler's Brain", despite bearing a 1963 copyright, was released years later. The 1963 film The Madmen of Mandoras was combined with new footage of "CID" agents Vic and Toni shot for the film and released to television as "They Saved Hitler's Brain". The Vic and Toni footage was clearly shot years later; the hairstyles and fashions did not become popular until the late 1960s.

A group of Nazi survivors save Hitler's brain keeping it alive in a huge jar hooked up to a machine. The Nazis plan to release a deadly gas destroying all life on the planet. To ensure their success they kidnap Professor Coleman the only man on the planet with the antidote to the poison gas.