S1, E8: When Alan and Judith argue during a rehearsal of a play that Jake and his classmates are rehearsing, Charlie is forced to handle a roomful of fourth graders alone. The kids think Charlie is a loser until they realize he wrote the "Maple Loops" cereal jingle. When Charlie discovers the children know every jingle he's ever written, he decides to use his commercial expertise to craft the play--with some interesting results.