Matt faces his toughest challenge yet, as the winged terror Icarus seeks to claim a recently uncovered bit of Hatter tech, the Anti-Matter Blaster. In Tenoroc's hands, Samuel Hatter's invention could be corrupted and turned into a deadly weapon, so Matt must take to the skies in an awesome aerial duel... with the fate of the entire Multiverse hanging in the balance.

Lord Tenoroc's scheming mind is set on finding the ultra-destructive Quake Hammer - and Roxie, it seems, is helping him track it down! Matt must prevent the mighty Cyclops using the Hammer to obliterate the Sea of Sands. Time is running out, but Gomez - for once - is up for the fight, having armed himself with a secret weapon from the mysterious Keepers' Cave.

It's Dad's birthday and Matt has a problem. How can Grandpa Alfred send Harry his traditional 'happy returns' of the day from his far-flung prison realm? And there are also unhappy returns in the shape of the turbo-charged Cyber-Racer, hell-bent on plunging Carnival City into never-ending darkness! The race is on but when the chequered flag falls, who will be left standing?

Count Venom is back from the dead. His broken vampire heart has been restored by Tenoroc, who has a malevolent mission for his fiendishly fanged accomplice - to poison the Enchanted Forest. Matt answers Roxie's urgent summons to find that she and Gomez are facing not just the Count, but vampire Tuk Tuks, too! And the Tuk Tuks aren't the only old friends who have turned to the dark side...

The brawling bulldozer Slamdroid is back and the unstoppable demolition droid has the Region of Ruins in its sights, determined to reduce tranquil Harmonia to rubble. Matt, Roxie and Gomez rush to the defence of the community but if they can't withstand the bludgeoning force of Slamdroid, Matt must put all their hopes in the crushing claws of one of his most fearsome enemies - Scorpiotron!

Tenoroc's plan to bring ruin to Carnival City nearly goes awry when his latest super-villain recruit - the dangerous but dim-witted bell-ringer Igor - takes a shine to Roxie. But his evil scheme to ring out the Chaos Bell is soon back on track. Matt must call on all his courage, wits and Hatter Tech if he is to stop Igor sounding the death-knell for the Street Kids' City home.

Zerona - the blood-chilling, battle-hungry ice-warrior - has brought winter to the Sea of Sands. She and her ferocious Frostbiters are deep-freezing the desert realm, at Tenoroc's bidding. It's down to Matt, Roxie and Gomez to free the Sands from Zerona's icy grip. They'll need all the help they can get from their Al Harbarian friends - and Priscilla the camel, too!

As if Carnival City wasn't spooky enough, now it's got a ghost to contend with in the shape of Tenoroc's latest villain, Toxic Jack. Matt, Roxie and Gomez must brave a haunted warehouse and the spine-tingling terrors within, unaware that Jack's true plan involves a mass prison break from the Chronicles and a city full of rampaging Super Villains, all with a score to settle with Matt.

An ancient, sacred creature has woken from its slumber to revitalise the Enchanted Forest - unless Lord Tenoroc can stop it! Tenoroc sets loose the blustering Colonel Buckshot to hunt down the Amber Dragon, and so spell doom for the Forest realm. But when the callous Colonel starts trapping Tuk Tuks for Dragon-bait, Roxie isn't about to let him get away with it...

Roxie's a camel! Matt's a tasty snack for the Sand-Snakes! And the only person between Arcana the Witch and the All-Seeing Eye of Argos... is Gomez! It's time for the last of the Keepers to stand up and be counted, as Tenoroc searches for his Vault of Mystery and the evil arsenal it contains. Can Gomez defeat the mistress of malicious magic and save his friends?

There's a shock in store for Matt in the Region of Ruins - and for once, it's a pleasant surprise! Friends and Realm Elders from across the Multiverse have come together to relive and celebrate Matt's achievements as Hatter Hero. For Lord Tenoroc, such a gathering offers too tempting a target to resist. He dispatches the mighty Magnifico, supercharged muscleman, to spoil the party.

Lowdown leprechaun Flipster uses his probability-altering Chaos Coins to swap Matt with something far-flung and remove him permanently, leaving the way clear for Tenoroc to conquer the Multiverse. But both Flipster and Tenoroc get more than they bargained for with the unexpected return of Grandpa Alfred, the previous Hatter Hero! One thing's for sure, nothing will ever be the same again!