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"Seriously Maudie? The mad professor is obviously a boy, had you even seen the movie?"
This article contains spoilers. We recommend that you watch the series before reading this article, or if it is not possible, read it at your own risk.

"The Case of the Sad Little Sister" is the eighteenth episode of The InBESTigators.


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.


Cast & Characters

Actor Character
Abby Bergman Ava Andrikides
Anna Cooke Maudie Miller
Aston Droomer Ezra Banks
Jamil Smyth-Secka Kyle Kilmson
Eliza Ong Poppy
Eden Vass MacKenzie
Bianca Cristiano Violet
Aidan Synan Milo
Clarke Richards Mr. Barker




Report Details


Crime Details


Name Crime
Poppy Banks Her school hat was stolen and she was forced to sit on the shelter shed.


Name Motive
MacKenzie She was feared that Poppy would be chosen to sit with Violet.



  • This episode received a preview on YouTube on the Netflix Futures' channel, and was promoted as "The Case of the Missing Hat".
  • This is the first episode where Poppy appears as a victim.
  • This episode is also the debut of Grade 3, Poppy and Luka's year group.

Cultural References

  • "No hat, no play" is a real rule enforced by Australian and NZ schools.
  • The scene in which Kyle farts under the armpit is similar to a scene in the opening theme of the animated series Clarence, in which the main characters fart in the armpit.


  • Poppy made a non-speaking appearance in the story of the episode "The Case of the Suspect Sprinkler".
  • The "No hat, no play" rule was also seen in the episode "The Case of the Peculiar Pop Quiz", since, during the interview with Kelly, everyone was wearing a hat.
  • Luka Franklin, according to Ezra, is in the same class as Poppy, which was mentioned in "The Case of the Pestering Prank Caller", but he was never shown.

Blooper Reels


Blooper Reel - Goof Tapes - The Inbestigators

The blooper reels are seen in this video.

  • In the scene where Ava tells Kyle to stop puns with his armpit for them to focus on finding Poppy's hat, Jamil (Kyle), by asking them to check the roof, since it looks like a hat magnet, he and Aston (Ezra) end up laughing.