Visible crew/equipment: In the last argument scene where Malcolm and Dewey are in the tigers cage,if you look over Malcolm's right shoulder you can see a man with a camera filming them.

Plot hole: Hal says that his father was never there when he got dumped. But in episode 7, "Francis Escapes" Hal tells Francis he's never been dumped.

Deliberate "mistake": When Malcom scares Reese with the horn while Reese is in the shower, Reese falls and we get a glimpse of the shorts he is wearing. Shorts in the shower?

Factual error: The supposed "Amazing Spider-Man 14" that is featured is actually a copy of "Amazing Spider-Man 351". Craig calls it a 1993 reprint of 14, yet 351 is actually from 1991.

Continuity: In the scene where Lois and the boys are in the clothing store, Lois piles a bunch of clothes in Reese's arms. The clothes change in his arms from shot to shot.

Plot hole: Hal states that Malcolm was supposed to pick Dewey up at school, but the earlier episode "Humilithon" established that Dewey now walks home unsupervised. (Malcolm doesn't yet have a driver's license, so this can't be a matter of convenience.)

Continuity: Malcolm's seat belt changes from on to off the first scene with him and his mom in the car. When it's a shot from the front it's on, but when it's a shot from the side (from the driver's/mom side) you can see that the part of the seat belt that's going across is now behind Malcolm, instead of on him like it was a second ago. This changes back and forth.

Continuity: In the escape scene when Hal runs out the store his boss presses a button to lower the shutters. This causes the pencils to fall out of the cup but in the next shot the pencils are back in the cup and roll off the table into the fan.

Continuity: When Lois and Hal work to draw up their will and then argue about Francis, Lois' hair changes repeatedly when the camera angles continually change.

Continuity: This mistake happens in the scene where Dewey bumps his head. In one shot, Lois puts her hand on Dewey's shoulder, and in the next shot, her hand is on his chest.

Plot hole: When Jamie is delivered, he's completely clean. Francis's hands are clean too...

Continuity: When Hal is in the hospital and is trying to get up and leave, he has three straps holding him down. We see him unbuckling the top two, but he leaves the bottom one. In the next shot, the strap is unbuckled.