Rob245

Answer: Apparently, nothing specific. He was just a difficult, combative, and destructive child.

raywest

Answer: Kaczmarek was an established name actor and therefore given top billing. Muniz was a juvenile, lesser-known talent with mostly minor roles in other film projects.

raywest

Answer: I'm not sure if they ever did but there's an episode with flashbacks and all of Lois' pregnancies. When Lois was pregnant with Malcolm, Hal used to do early stimulation exercises for Reese, it's proven that children who were stimulated early get higher IQ's. There's a line Louis says to Hal in that episode, something like: "He calls your phone. I don't know who is this helping, but not Reese", and then they do a close up to her belly, implying that's how Malcolm got so smart. But turning back to which side, probably Hal's side cause his father is kind of rich and successful as is most of his family which is why they didn't like Hal marring Lois. Ida and Victor were just farmers back in their country.