Harsher in Hindsight: Syd's comments about the entire American economy "going down the tubes" in an episode concerning a bank account virus, considering the current recession.
Hilarious in Hindsight: One episode shows the personalities of the cast pulling a "180" — notably, Amp went from a "space cadet" to a cultivated, verbose genius. Flash forward a few decades: Amp's actor goes on to be an attorney in California.
Nightmare Fuel: Episode 18: "Water You Doing?". Malcolm's dramatic reading of Coleridge's The Rime of the Ancient Mariner get's rejected from the school talent show for it being very disturbing. Rather than be a good sport about it, he decides to take his anger out on everyone by corrupting the city's water supply and turning all the water into hydrochloric acid, and it's even stated in-episode to be dangerous to people. If you read the Youtube comments, a lot of viewers expressed horror on how such a plot was shown on Saturday mornings and even compared Malcome's actions to that of a terrorist. Mind you this episode aired four years before the Columbine shooting and six before the 9/11 attacks.