A stakeout begins to catch the "Melon Felon," who is responsible for seven decapitated prostitutes; LaRue moonlights on a low-budget horror picture and "borrows" one of the props for a joke on an obnoxious detective; a department accountant dogs Furillo; Belker dreads being alone on his 37th birthday; and Chief Daniels uses his position to punish Mayo for refusing his advances the night before.