When Maudie solves a playground robbery on her first day at school, she and new friends Ezra, Ava and Kyle create The Inbestigators Detective Agency.
When Sophie's online shopping parcels are delivered but never received she hires the Inbestigators to track them down
Pixie is horrified when her space diorama goes missing and Miss Tan falsely accuses her of not doing her homework.
When his dance troupes concert routine is sabotaged, Zac hires the Inbestigators to find out who at the dance academy is responsible.
Pixie is furious when something she privately told Ava is made public, so Maudie resolves to find out how Pixies secret got out.
When Ben mounts a competition to see who can fit a very large biscuit in their mouth like he can, Maudie is suspicious.
When a prank caller targets Ezra and his neighbours, Maudie believes the Inbestigators can track down who is making the mystery calls.
At the sports carnival, Kyle loses his temper when he doesn't win a race, but Maudie suspects there might be more to Kyle's unexpected loss.
The Grade Five rock climbing excursion is jeopardised when the permission slips go missing, but Maudie suspects they may have been hidden on purpose.
When Maudie loses her beloved notebook Ezra, Ava and Kyle band together to reunite their friend with her most prized possession.
When the timer on Mrs Maniaci's sprinkler system is tampered with before the 'Garden of the Year' competition, the Inbestigators must track down the culprit.
Maudie and Ava infiltrate Mr Barker's grade six class to watch his famous pop quiz, where Maudie uncovers a crime.
When Annie's science fair experiment is stolen, the Inbestigators must track it down before the judging commences.
When Esther is injured in the dress rehearsal of the Grade Five play, Maudie must figure out who caused the mishap before showtime.
When Esther's painting is damaged during the Art Show, Maudie has trouble proving who ruined the artwork without finding the evidence first.
When a turtle is stolen from Ryan's backyard, Ezra offers the agency's services, but Maudie is convinced something about the robbery doesn't add up.
Mr McGillick is upset after he loses his precious 'World's Best Principal' mug, so Ezra makes it his personal mission to get it back.
Poppy loses her school hat and is forced to sit in the shelter shed, where Maudie discovers there may be more to the missing hat.
After a little girl's drone is blown away, the Inbestigators must prove that a boy in a neighbouring house has claimed it as his own.
Ava wants to give Maudie her first proper birthday party but Maudie gets sidetracked by a mystery.
Maudie is crushed when her tickets to a pop concert go missing, especially since it seems likely that she herself has misplaced them.
Kyle asks Maudie and Ava to make a video of his soccer match but Maudie discovers something about the game is not quite right.
When the Animal Shelter visits school to audition kids for a television commercial, Maudie suspects a crime is happening right under everyone's noses.
Ava is selected to deliver a speech at the town hall, but when she is accused of stealing it, Maudie must prove her innocence.
Ezra is grumpy when his visiting Nanna interrupts his detective work until she unexpectedly gives the Inbestigators a case to crack.
On Science and Technology dress-up day, Patrick is upset when his robot costume is stolen by an unidentified mad professor.
Kakow Koalas are the latest snack sensation sweeping the playground and Mario is hungry for justice when his are stolen.
Ava plans a birthday party to cheer up a lovesick Mr Barker, but things go wrong when his birthday cake goes missing during the celebrations.
Convinced a customer is cheating to claim a prize, Charlie hires the InBESTigators to help save his job at the Mini Golf Park.
The InBESTigators promise to help when Toby's birthday invitation to five friends is mysteriously copied and distributed to the entire class.
Ezra is outraged when everyone's treat day lunch orders are replaced with healthy food and insists on tracking down the culprit.
Maudie is upset when Ezra, Ava and Kyle promote their new intern to an InBESTigator after he surprisingly solves a case before Maudie.
When the ice-cream shop loses business because customers can't lock their cars, the InBESTigators must uncover why all the car keys in the area have stopped working.
After he accidentally signs up for the Trimathlon, Kyle surprises everyone by doing well, until he mysteriously can't find his cheat sheet.
When Gary, the school's lollipop man, is accused of stealing bags from parents' cars, Kyle is devastated and determined to clear his name.
Ezra is nominated for the Young Small Business Awards but as the event draws near, Ezra is increasingly upset and Maudie must find out why.
Amelia resents her fundraising cupcake stall being upstaged by a lemonade stall, so when things go sour, Amelia is accused of sabotage.
Ezra and Ava's friendship is tested when Ramona's fortune telling predictions come between them during the Coins for a Cure fundraiser.
When Mr McGillick's phone goes missing at the Grade Five camp, Kyle is accused of hiding it as part of a prank.
While on the hunt for Ezra's missing goldfish, Maudie uncovers two more puzzling mysteries to be solved.
