A former archaeologist friend-turned Arab nationalist revolutionary named Ahmed Kareem, who is being stalked by a vengeful mummy, attempts to frame Dr. Quest and Race for the theft of a priceless Egyptian artifact.

Dr. Zin sends a large, black, cyclopean, four-legged spider-like robot (by a flying saucer-like craft) to a U.S. government research facility in the American Southwest to steal the secrets of a para-power ray gun on which Dr. Quest is working.

An impostor disguised as Race is infiltrated into Dr. Quest's expedition to gather a rare pharmaceutical plant by Dr. Zin (who covets the plant's potential mind-control properties) in the jungles of Thailand.

On a visit to the castle residence of a fellow Norwegian scientist, Dr. Quest must help protect his colleague's latest invention (the anti-gravity generator) from a cat-burglar, disguised as one of a row of seven gargoyles on the roof, who regularly breaks into the estate.