Revealing: In season 5, second episode, in an imagination sequence Reese and Malcolm are throwing around Jamie, but you can see it is a doll.

Continuity: Episode 111 Season 6 "Pearl Harbor" Lois and Jessica enter the house after coming back from going to a musical. As Lois comes through the door her purse slips off her shoulder and she catches it around her elbow. In the next shot a second later, the purse is back up on her shoulder.

Continuity: In the episode "Bride of Ida", in the scene where the grandma is talking at the table with Reese and Malcolm, notice the bottle on the table next the the grandma, between takes the cork from the bottle goes from being on top of the bottle to next to the bottle, it changes in almost every different shot.

Continuity: In the episode where Lois takes revenge on the four girls who pranked Reese, Lois and Reese use a makeshift catapult to launch paint balloons at one of the girls and her date. The first balloon hits the girl, covering her left shoulder with pink paint. In the shot where her date gets hit with a balloon, her shoulder is no longer covered in paint. Some of the paint blotches change size and shape on both her and her date throughout this scene as well.

Continuity: Season 5, Episode 13, "Lois' Sister." When Susan arrives Hal is holding Jaime, and the baby's entire body changes position between shots repeatedly - in some shots the front of Jaime's body faces Hal, yet in others Jaime's back faces Hal. Submitted by Rikki

Continuity: Season 6, episode 7: "Hal Sleepwalks"; At school, Dewey stops the shouting match between the two opponents. In the shots facing Dewey, the boy's arms are held way up high in front of him, but in the shots facing the kids, the boy's arms are down at his sides. Submitted by Rikki

Continuity: IN the Season 5 episode "Goodbye Kitty", when Malcolm is throwing the dodgeballs at Stevie, the number of balls in the bag changes between shots. Submitted by t-bird

Continuity: In the Season 5 Episode, Goodbye Kitty, after Stevie becomes catatonic, a wrapper from a chocolate bar lands on his face, covering his glasses. The shot cuts and it's on his shoulder and then cuts again and it's on his face again. Submitted by t-bird

Continuity: Episode 16 Season 6 "No Motorcycles." Francis calls Hal out to the driveway where two motorcycles are parked. In the first camera shot the motorcycles are parked side by side with the front wheels turned in the same direction. All subsequent shots of the motorcycles in the driveway show them in a different position, one angled behind the other, with the front wheels turned in opposite directions.

Other: When it is Dewey's birthday Malcom grabs a piece of the cake. It goes to Dewey then back to Malcom and he is chewing, but there is no bite in the cake.

Continuity: When Lois hangs up on Francis before saying "Oh, I love you," it seems as though the line is already disconnected (as can be heard from the dial tone from Francis' side), but in a later shot, Malcolm and Reese are just about to hang up the phone.

Revealing: At the start, when Lois tells Hal to raise his arms so she can shave his armpits, if you look at the bottom of the screen you can briefly see that Hal is wearing something to cover up his privates.

Continuity: In the opening, we see Dewey's cold feet. Two shots later, his legs are in a different position.

Visible crew/equipment: When Malcolm is talking to his first teacher, you can just about see a small part of a microphone at the top of the screen.

Continuity: At the end of the scene where Malcolm defeats Spaz, Malcolm throws some chocolate pudding on him and it is dripping off. A few seconds later in the wide shot, Spaz has no chocolate on him.

Continuity: During the fight between Malcolm and Spath, Spath goes at Malcolm with his right fist, but the closeup of his hand going towards Malcolm and Stevie is his left hand.

Continuity: When Malcolm is in Stevie's room eating cookies, the cookie in Malcolm's right hand disappears and reappears between shots.

Visible crew/equipment: In the scene where Stevie is in Malcolm's room. When Stevie is talking you can see the boom mike poking out at the bottom left part of the screen.

Visible crew/equipment: When Dewey yells for Lois because the bow was put on the present, if you look to the left of Lois, you will see a crewmember kneeling down, handing Lois the red dress, who is holding a bucket of water. He quickly gets out of the camera's view. [This is on the DVD of the first season. Someone said on the audio commentary that after catching it, they deliberately left it in to see if anyone would spot it. It's still a mistake, but that's why it's there.]

Continuity: When Lois is yelling at the boys for playing with fire, the location of the green scissors on the table keeps changing between shots.