Starship C57D travels to planet Altair 4 in search of the crew of spaceship "Bellerophon," a scientific expedition that has been missing for 20 years, only to find…
A nuclear submarine on maneuvers in the Pacific Ocean, captained by Commander Pete Mathews (Kenneth Tobey), comes into contact with a massive sonar return. The commander…
Nyah, a female commander from Mars heads for London in her flying saucer. She is part of the advanced alien team looking for Earth men to replace the declining male…
An atomic war has seemingly destroyed most, if not all, of human civilization, leaving the Earth contaminated with radioactive fallout. The apparent single exception is…
In 1973, a nuclear-powered spaceship blasts off from Mars for Earth, bringing with it the sole survivor of the first mission, Col. Edward Carruthers (Marshall Thompson).…
U. S. Navy Commander Charles "Chuck" Prescott (Marshall Thompson) is unsure if his brother, Lt. Dan Prescott (Edwards), is the right choice for piloting the high…
Mourners are gathered around an old man at his wife's grave. Overhead, an airliner heads toward Burbank, California. The pilot, Jeff Trent, and his co-pilot Danny are…
Dr. Douglas Martin (Peter Graves) is a nuclear scientist working on atomic bomb tests. While collecting aerial data on a United States Air Force (USAF) atomic blast at…
The first U.S. spaceship to Venus, the XY-21, crashes into the Mediterranean sea off the coast of Sicily, Italy as fishermen watch. They row to the spacecraft, enter…
In the Salton Sea, an underwater earthquake causes a crevice to open, releasing prehistoric giant mollusks. A rescue training parachute jump is conducted, but the patrol…