Observatories on Earth are being mysteriously destroyed. The President of the United States calls Noman and Dynamo in for a mission to investigate the suspected source of the destruction, a military base on the moon. Noman discovers a civilization living on the dark side of the moon who wishes their existence to remain unknown to mankind.
A man is convinced that dogs are secretly planning to take over the world. His friend hypnotizes a dog and proves that it cannot understand complex questions. Neither suspects that the dog has been hypnotized by the cat.
Dynamo [Leonard Brown]; V: Dr. Sparta; Demo; Wilbur [lackey of Dr. Sparta]
THUNDER makes the mistake of putting Demo in the same prison cell as Dr. Sparta. The two pool their resources, and are sprung from prison by Dr. Sparta's minion, Wilbur. The combination of Demo's cavemen and Sparta's dinosaurs are enough to keep Dynamo's hands full.
Dynamo [Leonard Brown]; Andor (first appearance; villain); Subterraneans (villains); Overlord [leader of Subterraneans]; Lord Uru [Subterranean scientist, dies]
The subterranean scientist Lord Uru reports on his latest project to overthrow the surface dwellers to the Overlord. His project involved raising an abandoned surface baby, and subjecting the child to treatments to control its mind and give it super-human strength. The human, named Andor, infiltrates THUNDER, and nearly kills Dynamo before freeing himself from mind control. Andor returns to the subterranean world and kills Lord Uru.
A bullying strong-man torments the animals in the circus where he works. He is humiliated and beaten by a mysterious strong-man, who turns out to be a gorilla disguised by its trainer, who is a chimpanzee in disguise.