A mysterious new girl arrives at Funpark High and is everything Ace has ever dreamed of but is she too good to be true?
It's Hilda's birthday and Ned comes up with a diabolic plan to get his precious Mumsey the only present she really wants - Ace's braces.
It's the annual Humungous Man Trivia competition and Ace has some serious competition in Anoop, a geeky exchange student who also has his eye on the humungously awesome prize.
After accidentally destroying Mr Rainer's savage robotic guard dog, Ace is on a madcap chase all over town to catch the one piece of evidence that could bust him... the dog's video collar.
When Ned and Hilda trick Ace into brushing with a nanobot infused toothpaste, they gain total control of the braces and it's up to Hugo to defeat the uninvited mouth invader.
Ace signs up to work at Burpy's Burgers charity day, planning to use his braces to help win tickets to boyband Bad Complexion's Concert and score a date with Tina.
A case of mistaken identity leads Ace to become the town hero but he soon finds out it's not as exciting as it seems.
Ace and his eccentric Grandpa win a tour of Billy Bonkers' wondrous ice cream factory but discover that Ned and Hilda have turned the whole building into one giant trap!
It's Funpark High's big Halloween party and when Ace tries to impress Tina, he accidentally activates his braces and turns everyone into brain-dead Zombies!
When Tina gets trapped in the tower at the top of the Creepville Mansion, Ace sets off to rescue her but this time Ned and Hilda aren't the only ones waiting for him - so too are a hoard of angry Zombies.
Ignoring his Grandpa's warning that a ghost haunts the dark tunnels under Funpark City, Ace and his friends set off on a spooky treasure hunt.
The McDougal Family is selected to be contestants on the hit game show "In Your Face" but when the Director orders Ace to remove his shiny braces, Hugo and the high-tech gadget find themselves in extreme danger.
Mr Rainer's favourite garden gnome has been destroyed and all the evidence points to Ace. Can he clear his name before tough-as-nails Detective Hard Basket catches up to him?
Hilda's adorable but evil nephew Egbert comes to town and quickly wins over the whole school with his irresistibly cute looks. Now Ace must team up with a jealous Ned to stop this new pintsized threat.
Ace uses his braces to impress Tina and become the town's new superhero - Metal Mouth Man - but everyone knows that a good super hero needs an evil opponent and Ned and Hilda are only too happy to play their part.
When Ace's bumbling leaves super-spy Jack Union unable to complete his mission, Ace must step up and save Funpark City with a little help from some unexpected allies.
When Ace's parents hire a high-tech holographic Nanny, Hugo is totally smitten by her. But when the love-struck holograms run away, Ace must chase them into a virtual world to try and get back his friend.
A science lab accident sets Hugo free from the braces and turns him into a real boy. He sets off to discover the world, leaving Ace to battle Ned and Hilda on his own.
At Mr Walker's Air Guitar Camp, Ace gets on stage to show off his awesome skills but when his braces mysteriously eject into the frenzied crowd, Ace must find a way to get them back.
When Ace accidentally brings a Gargoyle statue to life, the terrified town folks set out to capture the mythical creature. Now Ace must find a way to protect his new friend.
When Ace wins the lead role in the latest Barry Plotter wizard movie, he is thrilled by his newfound fame until he learns that the part of Barry's arch nemesis Mouldy Warts is to be played by Ned.
Ace tricks Becky into a wild UFO chase so he can get some alone time with Tina. But his prank backfires when he realizes he has sent his sister right into danger.
It's Anoop's birthday and Ace gives him a ride in a space shuttle simulator. But when Ned and Hilda attack, Ace accidentally launches the shuttle into space.
Ace is outraged when his ticket to Humungous Man on Ice is stolen by a local cat burglar. So together with Athol, Claudia and Anoop, he sets out to track down the mysterious thief, unaware that the culprit is actually right under his nose.
Tired of Ace and Becky's constant squabbling, Jeanie sends them to circus school for the holidays. But when Ned's latest scheme leaves them dangling from the high wire, Ace and his sister must finally learn to work together.
Ace runs against Tina for school captain and discovers that high school politics is even more dangerous than battling evil super spies.
Dougal enters Funpark City's gardening contest but when Ace tries to help, a mishap with his Enlargerator Ray results in a bad tempered 50-foot plant rampaging through the City.
When the Mayor tries to steal his braces, Ace suspects that she has been replaced by Ned. But he quickly learns that Ned isn't the real mastermind behind the evil plot.
Professor Pringle updates Ace's braces, giving him a superior new hologram but Ace soon begins to miss his stuffy old pal Hugo and sets out to get him back.
Jack Union returns to offer Ace a job as an official Junior Super Spy but first Ace will have to pass one final test. Things only get harder when Ned and Hilda cook up the ultimate evil plot to stop him.
