Charlie realizes Jake's classmates know the words to all of his jingles, and he is inspired to craft the fourth-grade musical with unusual results.
Jane and Maura must conduct a secret investigation when a shooter begins to target marathon runners.
Adam accidentally gets Barry kicked out of a group of cool kids at school; Beverly is upset when she finds out that Erica hangs out with a friend's mother.
Murray’s (Jeff Garlin) mustache ignites a feud between Beverly (Wendi McLendon-Covey) and his best friend, Bill (David Koechner). Barry (Troy Gentile) is convinced he’s lost Lainey (AJ Michalka) to Boy George.
Beverly helps Erica plan a "Dirty Dancing" themed dance at school, only to turn on Erica when she realizes it may be inappropriate. Meanwhile, Murray tries to learn dancing with Adam with little luck.