There isn't a single joke that falls flat in the show -- from the episode's title, Parasites Lost, to the name of the space highway (Square Route of 66) to the fact that Fry has an internal elevator that goes from the brain to the ballroom. We would still like to see more interesting characters outside of the Planet Express Crew, as Futurama has yet to introduce memorable neighborhood characters such as Flanders, Apu and the Comic Book Store guy. Fry and Bender are the two halves of Homer, and Leela is still an ass-kicking version of Marge. But it's hard to complain about underused characters when the primary cast is used so brilliantly. Futurama needs a better time slot, but Fox seems intent on keeping its head where the worms are.