1. The Case of the Curious New Girl / The Case of the Disappearing Deliveries

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

2. The Case of the Missing Solar System / The Case of the Distressed Dancer

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.

3. The Case of the Sleepover Secret / The Case of the Big Mouth Challenge

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?

4. The Case of the Pestering Prank Caller / The Case of the Spoiled Sports Day

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

5. The Case of the Exciting Excursion / The Case of the Very Lost Notebook

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.

6. The Case of the Suspect Sprinkler / The Case of the Peculiar Pop Quiz

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

7. The Case of the Science Sabotage / The Case of the Wrecked Rehearsal

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.

8. The Case of the Perplexing Painting / The Case of the Turtle Thief

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!

9. The Case of the Misplaced Mug / The Case of the Sad Little Sister

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.

10. The Case of the Disoriented Drone / The Case of the Baffling Birthday

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