Ava is devastated when Pixie stops talking to her after a sleepover. The new boy in school can fit a very big cookie in his mouth -- but how?

A little girl's drone flies off and disappears -- but the Inbestigators witnessed everything. For her birthday, Maudie's dad stops by the office.

There's a new girl at school who makes quite an impression on Ezra -- then the Inbestigators get their very first case.

A prank caller keeps bothering Mrs. Maniaci in the middle of her soap opera. Kyle's favorite event of the year goes terribly wrong.

Mrs. Maniaci's roses are ruined by a tampered sprinkler system. The students in Mr. Barker's class seem to be up to something.

If Miss Tan doesn't find everyone's permission slips, the class will miss their field trip! Maudie's beside herself after losing her special notebook.

Someone with great aim has ruined Esther's painting. Later, the Inbestigators need to move fast -- because there's a turtle thief on the loose!

It's an emergency when Mr. McGillick's "World's Best Principal" mug goes missing. Poppy's lost her hat, and now she can't play outside.

Pixie's solar system diorama has gone missing, but did she make one in the first place? Maudie figures out who sabotaged Zac's dance recital.

The Inbestigators get hired to solve a mystery at the science fair, much to Ezra's delight. The star of the school play gets hurt during rehearsals.