Dot Polka; Uncle Branes; Lotta Plump; Lottie; Chuck; Jane; Miss Shrapnel; Mildred Frumply; Mr. Polka; Mrs. Polka; Dot Watson
Dot experiments with her Uncle's new invention, a device that can make her invisible. As a result, she overhears less-than-flattering conversations about her among her friends. In every case, though, it turns out they were talking about another "Dot".
Richie overhears his father assigning Cadbury to watch over Richie. So, Richie spends the rest of the day trying to stymie Cadbury in his assignment. Eventually, Richie finally seems to have given his pursuer the slip. Or maybe not.