A flea from the planet Krypton gives Krypto one super itch / Lex Luthor's pet lizard uses a growth ray to turn a caterpillar into a giant monster!

While the Dog Stars are repairing their ship on Earth, Krypto introduces them to Ace. He is soon mocked because he doesn't have any powers of his own, so he leaves. However, when Snooky abducts Hot Dog without leaving a trace, Ace may be the only one the Dog Stars can count on / Tired of living like a rat, Jimmy disguises himself as a dog. But when Mutsy's group wants him to join them, he may be in over his head.

Kevin learns a lesson about the importance of family when he and Krypto are magically transported to Storybook Land, where the characters resemble Kevin's relatives. Krypto and Kevin's trip to Storybook Land continues.