A school scandal leads Fillmore and Ingrid into an investigation involving a gambling underworld.
Fillmore recruits an old friend to help solve a case.
Fillmore and Ingrid go underover to stop a scooter-jacking ring.
A field trip goes wrong when someone paints a mustache on one of the paintings.
Fillmore foils attempts to steal the math exam answers.
Ingrid arrives at X Middle School and teams up with Fillmore.
Fillmore and Ingrid try to rescue a boy's virtual pet.
Fillmore and Ingrid try to figure out who is undermining the model train convention.
Ingrid goes undercover in girls' group the Red Robins, to try to find the vault where they hide stolen candy, but she fits in really well, and soon finds she has split loyalties.
Ingrid and Fillmore try to find out who kidnapped the school mascot.
All the books in the school library have been stolen, and suspicion falls on Tony. However, Fillmore and Ingrid investigate, and find a most unlikely culprit.
Fillmore and Ingrid track down the culprit who stole exams from the school.
Ingrid and Fillmore hunt for a graffiti artist.