Robert Dunham

The undersea nation of Seatopia sends the gigantic Megalon to destroy the world above - and it's up to Godzilla and a size-shifting robot, Jet Jaguar, to defeat him. (imdb)

Several satellites have been destroyed without explanation. A few days later, a group of diamond thieves are thwarted when the gems they are after suddenly disappear. Strangely enough, the two incidents are connected when scientists discover that a giant jellyfish like creature, which was mutated due to a high amount of radiation hovering over Japan, is drawing up all carbon based matter, including coal and diamonds... (imdb)

A giant asteroid is heading toward Earth so some astronauts disembark from a nearby space station to blow it up. The mission is successful, and they return to the station unknowingly bringing back a gooey green substance that mutates into one-eyed tentacled monsters that feed off electricity. Soon the station is crawling with them, and people are being zapped left and right! (imdb)

A group of peoeple with psychic abilities try to prevent the assassination of a head-of-state by a group of people with psychic abilities.