An alien wreaks havoc on Earth then vanishes into thin air, but Superboy and Krypto are hot on his trail. They travel to the alien's home planet to stop the impending invasion.
A millionaire wants to experience laughter just once before he dies and he's willing to give a million dollars to the charity of anyone who can grant his wish, including Superboy.
Superboy innocently takes a decorative black sphere from the Earth's core, but the sphere is more than it appears to be and Superboy has to save the day before the town is destroyed.
A professor's experiment to help animal species grow and develop more quickly backfires when a baby elephant reverts back to an Ice Age mastodon. It's up to Superboy to stop the out of control creature.
Aliens intend on conquering Earth. Since the first 2 beings they meet from the planet are Superboy and Krypto, they quickly change their minds about taking over since they are fooled into thinking all Earthlings are as strong as these 2.
Botanist Professor Potter accidentally creates a serum for Kryptonite poisoning which he gives to Superboy, but he mixes it up with another chemical which causes Superboy to turn into a giant.
Clark Kent's Halloween costume convinces a group of criminals that he is indeed the devil himself and Clark uses his super powers to further fool the crooks.
