Russ breaks Mr Tesslar's car headlight, so Toby creates some invisibility paint until they can fix the headlight.

Toby produces a pheromone compound to make the guys irresistible to the girls.

Elizabeth sets up a secret lab in the school's basement, and orders Garth to shrink objects from the storeroom; but Dina discovers him. Panicking, he shrinks Dina.

Elizabeth, in her basement lab uses too much power and Mr Tesslar tries to track it down, but she sets up Toby and Russ to keep the location of the basement lab safe.

A new student arrives at Sandy Bay School, Jack. His only wish is to discover Elizabeth and Toby's secret. Elizabeth has turned Toby's cousin Sasha and Russ into flies. Will Toby come to her rescue when she's held by a giant koala?

When Toby wants to get into the swim team to impress Niki, he makes a formula that makes him swim like a fish. But what will happen when Elizabeth finds out