Gaspard and Lisa accidentally break Charles' model rocket and have to find a way to fix it before the big contest.
Lisa takes the school guinea pig home with her, but when it gets loose, she and Gaspard have to decide whether to cover up or come clean.
Lisa's father is putting up new wallpaper in her older sister Victoria's room. But this means Lisa will have to share her room with her sister until the wallpaper is up. Lisa isn't happy about sharing her room, especially when her sister tries to take over. So Gaspard and Lisa decide to finish the job, so Lisa can have her room back.
Returning to the city after visiting his grandmother in the country, Gaspard and his family bring home a box of fresh vegetables from his grandmother's garden. As his mother loves fresh tomatoes, he decides to grow tomatoes just for her. So with Lisa's help he makes a 'secret garden' under his bed. However when he waters the tomatoes he doesn't realise he's actually watering M. Huget's ceiling as well.
Gaspard and Lisa accidentally break Mama's favorite vase and work together to fix the damage.
Gaspard and Lisa accidentally let Charles' special kite go and they have to retrieve it.
After Gaspard and Lisa let a chicken out of Mamie Mathilde's neighbour's henhouse, they have to keep the egg warm while they search for the missing bird.
Prince gets muddy while Gaspard and Lisa are watching him, and they have to figure out a way to make things right with Mamie Mathilde.
Gaspard and Lisa argue about who's the star of the magic act they are going to put on at the school talent show, and Gaspard quits, only to return to help Lisa.
Gaspard and Lisa try to stage their own puppet show, but catostrophe: the puppets have gone missing and everyone has arrived for the show.
Gaspard wants a shiny new truck but doesn't have enough money, so he and Lisa try to find ways to raise funds.
Gaspard and Lisa borrow Mr Delpy's parrot to take to school pet day, but the parrot gets loose and they have to retrieve it.
It’s almost Christmas and Gaspard and Lisa need to find a present for their teacher, fast. Gaspard is full of ideas, but none of them seems quite right.
Gaspard and Lisa take a trip to Gaspard's Mamie Mathilde's in the country. While there, they try to solve the mystery of Mamie Mathilde's missing tomatoes.
Catastrophe: the gift Lisa has made her mother for Mother's Day has been ruined. Can Gaspard help Lisa find her mother a new gift in time?
Gaspard and Lisa cause havoc in the department store while waiting for Victoria and Mama.
Gaspard and Lisa resolve to make M. Huget smile as he bird-watches, but then learn the truth behind his sad mood--it's his birthday.
Gaspard & Lisa accidentally let Mme Baladi's dog loose in the park and have to retrieve him.
Gaspard and Lisa are excited to take their first train ride, and when they get in trouble with the Conductor, Papa comes to their aid.
The special pastry that Lisa's maman has made gets eaten on Gaspard and Lisa's watch, and they have to figure out how to replace it.
Gaspard babysits a puppy with Lisa's help and finds out it's harder than he thought.
Gaspard and Lisa ruin the special cake they've picked up for Lisa's grandparents' Anniversary party and try to restore it.
Gaspard and Lisa recall how they first met and, after a bumpy start, became best friends.
Gaspard and Lisa visit the beach with their class for Art Day, and, even though a wave destroys their sand castle, they learn that the tide can give back as well
Gaspard and Lisa help Mamie Mathilde get ready for a junk sale, but when the keys get locked in the car, Lisa saves the day.
The friendship is threatened when Gaspard learns to whistle and Lisa can't.
Magician Gaspard thinks he's made Lisa's grandpere disappear, and they have to 'bring him back' before Maman gets home.
Gaspard offers to mail an important letter for Charles by the end of the day but, despite Lisa's help, he keeps forgetting.
Gaspard and Lisa bring a frog home from the country by mistake, and Gaspard decides to keep it as a pet.
Grandmere comes over to teach Gaspard and Lisa how to make croissants, but when they add too much yeast to the dough - catastrophe!
Gaspard and Lisa bring their instruments home from school to rehearse for the big show, but have to improvise when the instruments get lost.
Gaspard and Lisa have to play pirates when Prince buries Mamie Mathilde's bracelet somewhere in the yard.
Gaspard and Lisa decide to start their own club, but have trouble finding a secret place to meet.
On a snowy day at school, Gaspard and Lisa build a giant snow bear in the playground, but when they try to move it - catastrophe!
Lisa's scarf is carried off by the wind, and she and Gaspard and Mr Huget have to track it down.
Lisa has found a stray kitten and, with Gaspard's help, secretly keeps it in his bedroom until they're found out.
Lisa feels left out when Gaspard learns to ride his bike without training wheels.
Gaspard's Papa loses an important piece of paper, and Gaspard and Lisa 'help' him find it, turning his home office upside down in the process.
Gaspard and Lisa are given the important task of buying a baguette, but end up eating it before they get home and have to figure out how to replace it.
When Lisa's dance performance is jeopardized by a case of the hiccups, Gaspard tries to help her get rid of them.
Lisa and Gaspard, helping out in Mr Delpy's pet store, accidentally let the parrots out of their cage and have to retrieve them before the store opens.
Gaspard gets upset when Lisa joins his judo class and becomes better at it than he.
Gaspard's bag gets a hole in it, and he and Lisa have to retrieve all the lost objects, including an important library book.
Lisa helps Gaspard when he accidentally ruins a family photo that was supposed to be a present for his parents.
Gaspard and Lisa accidentally send the local bicycle race off-course and, trying to correct their mistake, end up joining in.
When Gaspard stays home from school with a cold, Lisa has to cope with missing her friend and figure out how to present their school project.
Gaspard's art class painting gets lost, and Lisa helps him find it, in the most unusual of places.
Gaspard and Lisa make friends with a duck at the park, but chaos reigns when the duck invades the family picnic with some of his friends.
When they hear mysterious sounds, Gaspard and Lisa are convinced that there's a monster trapped at Gaspard's and are determined to get rid of it.
Gaspard and Lisa learn about the true spirit of Christmas when they both ask Santa for the same snow globe - but it's the only one in the world!
Lisa remembers how she felt neglected when her little sister was born, until she realised that she'll always be special to her Maman.