Someone has stolen the legendary cyber beast Choocroca from cyberspace EcoHaven.

King Dudicus accidentally uncovers the long-lost "Totally Rad Ring of Radopolis," which grants whoever wears it on their head their hearts desires. The citizens suggest putting it in a safe place where nobody can use it for anything, but Hacker steals it and uses it to attack Motherboard.

Hacker's insulting letters to Mr. Zero cause him to leave Gollywood, leading all zeros on signs to disappear and further chaos to ensure. However, contrary to what the people think, their main central bank still has all nine million snelfus, which Hacker plans to use to finance all his conquering quests.

Hacker doesn't know he is allergic to magnetite, which he uses to plan to erase Motherboard forever. Meanwhile, Hacker keeps a bunch of Scritter hostage, and he subsequently captures Digit.

Tikiville crowns its new monarchs with a race, which Creech, once part of a royal family, plans to win. Hacker also enters the race, planning to use the crown to turn Tikiville's giant statues into an army if he wins.

After the prince of crabs takes a dare and becomes dishonest after falling in the Abyss, the kids and Digit must find the Grapes of Plath to restore his ability to tell the truth, located in the Fountain of Truth. Unfortunately, Hacker is pursuing the Grapes as well. Because he thought Motherboard said "Fountain of Youth", and assumes the grapes can and will fix his chin problem.

Hacker tries to restore his giant robot, Gigabyte, by using the rays of Jimaya's sun. Delete is excited, but Buzz becomes jealous.

The Cybrary is under attack again, and the kids have to use logic and elimination processes to stop Hacker from entering Motherboard's vault.

The kids win the encryptor chip in an auction after saving enough money to buy it, but Hacker infected it and subsequently made himself the ruler of Cyberspace. After saving Dr. Marbles, the kids help him save Motherboard by having to reboot her, destroying the encryptor chip in the process. Meanwhile, Hacker breaks up with Wicked upon discovering she spent all 10 million snelfus on clothes and merchandise.

The kids win the encryptor chip in an auction after saving enough money to buy it, but Hacker infected it and subsequently made himself the ruler of Cyberspace. After saving Dr. Marbles, the kids help him save Motherboard by having to reboot her, destroying the encryptor chip in the process. Meanwhile, Hacker breaks up with Wicked upon discovering she spent all 10 million snelfus on clothes and merchandise.

Digit and the kids help Shari of Frogsnorts bake the Cosmic Crumpets. Hacker then attempts to use the magical Cosmic Crumpets to steal the powers of the scorcerers of Frogsnorts and become the most powerful magician in Cyberspace. When Hacker steals the sorcerers' powers, the Cybersquad helps Shari restore the magicians' powers.

Hacker tries to destroy the festivities during Cyberspace's favorite holiday, Starlight Night (a mix of Christmas and New Year's Eve in the same day).

Hacker tries to ruin Digit's birthday party, though Digit thinks it's actually for Judge Trudy (since that was how the secret was kept from him).

Hacker destroys 3 boxes covering the Book of Unhappy Endings, and releases the Unhappy Endings. The CyberSquad must return the book by sundown.

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It’s Halloween Haunt-O-Rama in R-Fair City, and Hacker has a wicked treat up his sleeve: to keep the kids out of Cyberspace forever by crashing Motherboard’s portal system. But when Buzz and Delete make a mistake, the portal system crashes too late, and the kids and Digit are trapped in R-Fair City! Now, the kids must find enough energy to power Digit’s portal rebooter and keep the amusement park going. But with the celebration in full swing, can they find big and small ways to save enough energy? And can they ever get back to Earth again?

A disagreement drives a wedge between friends when Inez tells Creech her bike path should be shut down.

On his annual trip to visit Eugene, Digit finds out that poor conditions in Mermaidos have forced many of the fish from their home.

Motherboard invites the kids for a slumber party with Digit in Control Central.

Delete joins forces with the CyberSquad to build a giant windmill for the little town of Bottawa after Hacker steals its power source.

As the Three Pigs celebrate their new cottage with a housewarming party, Hacker and Wicked accidentally zap away Mount Evermore -- which had been protecting the cottage from direct sunlight.

Hacker plots a revenge when he loses to Inez at the annual flower-growing contest.

Hacker enlists the help of CyberSquad to get back home.

Professor Bobson calls on citizen scientists to help when the trillers fail to show up for the Migration Celebration.

The kids promise to help Pearl spread the word about the water problem in Canalia, and they convince Canalians to change their water-wasting ways.