Episode 1 - Captain Dumblewit's Toughest Mission Yet

Grandpa's childhood friend Granddad Gilbert comes to visit with his granddaughter Martha. Unfortunately, Gilbert has forgotten how to have fun so Grandpa sets out to remind him.

Episode 2 - Mr Mentor's Custard Puff Plopper

Mr Mentor the Inventor asks Dad to look after his Custard Puff Plopper, but the invention is not behaving itself! Grandpa is sure he can fix it - if only he can get inside.

Episode 3 - No Two Rings the Same

Mr Mentor the Inventor has invented some Brillioso Bicycle Bells. Mr Liker Biker rushes to Dad's Bike Shop and starts trying them all out. How can Grandpa get him to leave Dad in peace?

Episode 4 - A Carrot Called Christopher and Other Odd Vegetables

When Mum leaves Jason and Grandpa in charge of her newly grown 'odd' vegetables who should arrive but Great Aunt Loretta? She wants to invent a stew for Mr Mentor but Grandpa is sure the vegetables don't want to be cooked.

Episode 5 - Taking Floyd for a Ride

When Floyd has a little accident in the garden, Grandpa suspects he is just pretending to be hurt. Grandpa wants to catch Floyd out - he just needs to find a way to make him run...

Episode 6 - Trying to Play with Shy Shanay

Jemima is looking forward to looking after a little boy called Shanay but when he arrives he's far too shy to play with anything. Will Grandpa and Jason together find a way to cure Shanay of his shyness?

Episode 7 - A Day for a Play in Miss Smiley's Cafe

Jason and Jemima are putting on a Captain Dumbletwit play. All is going well until Floyd turns up and takes over. Disaster strikes - but Grandpa is determined that the show must go on!

Episode 8 - Jemima's New Best Friend

New girl at school Tiffany Jayne Grottington Pump comes round to play with Jemima. But Tiffany wants everything her own way. Grandpa puts on his shrinking cap and decides to teach her a lesson.

Episode 9 - Bubbles and Squeak

Bubbles the babysitter has a new kitten which she brings round to show to the Mason family. Unfortunately Floyd turns up and tries to make Bubbles jump. Before long Floyd gets a taste of his own medicine!

Episode 10 - No More Dolls for Dora

When Jason goes to the toyshop to choose a birthday present for his friend Dora, Grandpa can't resist shrinking and coming along too. But who should arrive in the shop? Dora's Aunt, the formidable Lady Prigsbottom!

Episode 11 - A Very Needy Speedy Edie

Mr Liker Biker is looking after the Bike Shop when a very important customer turns up. Speedy Edie's shopping style sends Mr Liker Biker into a spin but Grandpa is sure he can help out!

Episode 12 - Making the Most of Max

Jason's cousin Max comes to visit Grandpa. Together they make a model caveman. When Mr Cave Man meets with an accident Grandpa has no choice but to step in and save the day.

Episode 13 - Miss Smiley's Strawberry Surprise

Jason and Jemima go to Miss Smiley's Fun Kitchen club to learn how to cook some of her recipes. Floyd is also in the class and is soon up to mischief. Little does he know that Grandpa is keeping an eye on him!

Episode 14 - In It To Win

Cousin Alvin has gone all sporty. He makes the Masons play lots of games and is desperate to beat them at everything, especially Table Football. Grandpa sets out to turn Alvin into a good loser.

Episode 15 - Horatio Heave Ho

The man in the beach hut opposite wants to be a real pirate. So when Horatio Heave Ho decides to dig up Sunnysands beach in search of treasure Grandpa comes to the rescue.

Episode 16 - Great Aunt Loretta's Not So Great Plan

Episode 17 - Mr Whoops' Toy of the Week

Jason and Jemima go to Mr Whoops' toyshop to choose his Toy of the Week. But Floyd turns up and starts teasing Jemima who has picked up a cute little puppet. Grandpa rushes to Jemima's aid!

Episode 18 - A Perfect Little Litter Picker

When Mr Whoops hurts his back picking up litter on the beach Grandpa decides that he needs a Litter Picker and who better to invent one than Mr Mentor. But a Litter Picker will need a bit of Grandpa's magic to work!

Episode 19 - Big Elf, Little Elf

Mum is making everyone fancy dress costumes, but Great Aunt Loretta decides she needs some help. Mrs Maridadi the Dressmaker turns up and immediately has designs on Grandpa's Shrinking Cap.

Episode 20 - A Song For Miss Smiley

Mr Whoops has bought a musical box for Miss Smiley and he's even made up a song to sing to her. But he keeps having little accidents with the musical box key. Good job Grandpa can shrink and get into tiny places!

Episode 21 - Mr Scoffbucket the Goat

Mum leaves Great Aunt Loretta in charge of her friend's goat, Mr Scoffbucket with disastrous results. When all Grandpa's plans to help fail he has to fly off to get help from a friend.

Episode 22 - Miss Smiley's Dancing Tea

Bubble the babysitter has come round to teach everyone how to Flamenco dance because Miss Smiley is holding a "dancing tea!" But Great Aunt Loretta arrives and tries to take over.

Episode 23 - Sunnysands Tick Tock Shock

Great Aunt Loretta has decided to make a clock for Mr Mentor's clock competition. Grandpa is keen that she should win because the prize is a holdiay! But her clock is a big disaster - until, that is, Grandpa steps in.

Episode 24 - Wulfy's Day With Mr Whoops

Mr Whoops wants a dog and Mum suggests that he tries looking after Wulfy for a day. Grandpa shrinks and goes to help out. But Wulfy ends up looking after Mr Whoops, instead of the other way round.

Episode 25 - Captain Shipshape and a Fish Called Bryan

When a big cruise ship breaks down in Sunnysands, Mum invites the Captain to stay. He insists that they all perform various exhausting tasks every hour. But Grandpa has a brilliant plan to get rid of the bossy Captain.

Episode 26 - Grandpa's Greatest Escape Ever

Great Aunt Loretta is planning an invention with Mr Mentor and Grandpa decides to help.