Malcolm reprises his role as Sherry's estranged grandmother Hattie Mae Price - known affectionately as Big Momma - and secures the nanny job by exposing flaws in the other candidates. While he keeps his eyes on Tom, Malcolm learns that the Fuller family has problems: Tom's wife Leah is very strict on chores; eldest daughter Molly seeks to be someone she is not; youngest daughter Carrie strives to do well as a cheerleader; and infant son Andrew has a habit of jumping off of tall objects. Although he finds evidence that Tom is working alongside a notorious hacker, Sherry tracks him down after discovering he lied to her and is heartbroken to discover he is working on a case. The matter is then made worse when Morales discover him interfering in her case, and allows him to assist as long as he maintains his cover and retains Kevin as his partner. After Leah threatens to fire Big Momma for her handling of her chores, Malcolm spends the night cleaning the house to win back her favor.