Krypto the Superdog chronicles the comedic canine adventures of Metropolis' day-saving superdog from Planet Krypton. Krypto jettisons to Earth after traveling across the galaxies as a test-pilot puppy aboard a malfunctioning rocket ship built by Superman's father. Landing astray on unfamiliar terrain, the fully-grown Krypto swiftly seeks out companionship on Earth and flips over Kevin Whitney, a young boy who too longs for friendship. With an amazing array of super hero powers, ranging from heat vision to super strength to flying, Krypto partners with best pal Kevin to fight evil forces that threaten the safety and well-being of the people and animals of Metropolis.
Bat Hound Meets the Dog Stars: 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.
Bat Hound and the Robin: Bat Hound is at his wit's end when a feisty Robin decides to become his crime-fighting partner.
When Mechanikat creates a robot double of himself, he soon finds that his creation has a mind of its own. He's left with only one option...ask the Dog Stars for help.
Mechanikat uses an aging ray on Superdog, but accidentally hits Kevin in the process as well. Can they restore their bodies back to normal?
When Ignatius gets bored, he clones himself with a new Lexcorp device. But when the machine gets out of control and creates endless clones of him, Superdog has to fetch them all.
Isis steals a magical pipe that can control animals and uses it to rob stores in Metropolis. When Ace and Krypto end up under her spell, Jimmy the rat has to fight her off.
Bailey returns to prove Krypto's secret identity as Superdog. Only this time, Andrea has to help Kevin keep the secret when he finds out about Supercat.
Stretch-O-Mutt is so excited to see the Dog Stars, however a pod enters with a space virus and infects the Dog Stars... except Krypto and Stretch-O-Mutt. To make things worse, the Dog Stars ship is struck by a Kryptonite ray. With all the Dog Stars sick, a weak Krypto and Stretch-O-Mutt must fool Mechanikat into thinking the Dog Stars aren't infected before Mechanikat and Snooky take over the ship!
When a parrot named Blackbeak and his rat pirate crew cause trouble in Metropolis, Streaky and Stretch-O-Mutt team up to put a stop to them. It seems like an easy task, but Blackbeak's pendant holds a special power.
While away at Summer Camp, Kevin overhears some beavers talking about conquering the humans. After following them, Kevin finds out that they are being led by alien beaver, named Buggy, who is helping them build weapons with the trees. After he is captured, he contact Krypto, who, along with Streaky, arrives to help. It's up to Krypto, Streaky, and Kevin expose Buggy's true identity to the beavers.