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.
The NCIS team investigates the death of a young Marine that came to his homecoming party with a stab wound.
When Hal kicks Malcolm out of the house for misbehaving, Reese tries to take advantage of Hal's distraction to come up with a truly bad stunt of his own, and Francis takes offense when Otto's musician nephew plays a musical accompaniment to Francis' every move.
Beverly is ordered to clean out the garage by Murray, who wants everything gone except for one trunk that he's particularly sentimental about. Meanwhile, Adam and Barry discover Erica's old collection of New Kids on the Block memorabilia.
A modeling representative approaches Barry in the mall, which leads him to believe he's about to become famous, while Beverly threatens the rep to land her son a gig. Elsewhere, Adam tries to make peace between Murray and his grumpy Pop-Pop.
