Character mistake: When Otto tells Francis he has to put a horse down, Francis objects saying he's never killed anything bigger than a poodle, and that was an accident. However, in season 4 (episode 11), Francis accidentally killed Otto's pet cow. (00:11:30)
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.]
Opening theme song: Yes, no, maybe, I don't know, can you repeat the question? You're not the boss of me now, You're not the boss of me now, You're not the boss of me now, and you're not so big. You're not the boss of me now, You're not the boss of me now, You're not the boss of me now, and you're not so big. Life is unfair.
More trivia for Malcolm in the Middle
More questions & answers from Malcolm in the Middle
Answer: Francis is only allowed to talk on the phone at school for three minutes a day. I think the code gives him free access to talk to his girlfriend.