Mayor Shelbourne mistakenly believes that Flint's invention made him invisible; Flint creates a superhero alter ego; Flint turns Tim into a fish; Shelbourne steals Flint's invention; Sam plots revenge; Flint gives Gil some much-needed confidence.
Gil discovers Flint's most valued possession: Einstein's moustache. When he begins to wear it, Shelbourne believes he is a fellow principal and they bond.
When Flint's inventing causes the power bill to skyrocket, Tim unceremoniously takes the Lockwood house off the grid.
Flint helps Brent with his science project, inadvertently creating a cool new element in the process for which Brent takes all the credit.
Sam receives a pet penguin from her Pet of the Month Club, unaware of Swallow Falls' long and terrible history with the aquatic bird.
Gil wears Einstein's moustache, fooling Shelbourne; Tim takes the Lockwood house off the grid; Flint and Brent invent a new element; Sam receives a pet penguin, unaware of a terrible trend; Flint beats Mayor Shelbourne in a game.
Mark Edwards
Flint/Steve
Katie Griffin
Sam
David Berni
Baby Brent
Seán Cullen
Tim/Mayor Shelbourne/Old Rick
Patrick McKenna
Gill/Manny