|Season 1, Episode 3|
|Air date||January 23, 2000|
|Written by||Michael Glouberman & Andrew Orenstein|
|Directed by||Todd Holland|
Francis comes home from Marlin Academy to visit for the weekend, while Lois and Hal are away. Malcolm overhears them wonder if he's a mature adult and different than the delinquent he is before.
Lois and Hal are spending the weekend at a family wedding, leaving Francis -- home for a visit -- in charge. When Malcolm overhears them discussing whether Francis has spent long enough at the military academy, he enlists his brothers in a scheme to get Francis home by preventing any of the usual disasters. But three of Francis's dude buddies turn up to party and trash the house, and while frantically cleaning up Malcolm gets a serious head injury that necessitates the usual trip to the emergency ward. Meanwhile, Hal and Lois discover that his family has a new nickname for her: "Lois Common Denominator." Her humiliation provokes Hal to declare his devotion to her.
- This episode's title is a homage to the Home Alone franchise. By the time this episode was made, the franchise had made three movies and so this was titled "Home Alone 4" as a joke sequel on that.
- In 2002, they actually would have come out with a Home Alone 4.
- While Malcolm, Reese, Dewey, and Francis are deliberately making their house messy, you can see right above their ceiling a bright light shining down and a black background. It shows that they film their interior of their house on a set.