Time is a tricky adversary in "Futurama." It's been 24 years since the show first debuted in 1999, but in the latest season, available on Hulu, the characters clearly haven't aged 24 years. But, unlike on "The Simpsons," the characters have aged at least a little bit. Bart Simpson has been 10 years old for 35 years. Fry and Leela (Billy West and Katey Sagal) seem to have grown together as a couple and both have matured ever so slightly, implying the passage of real time. In 24 years, they have aged maybe seven. Hilariously, the Professor (West) seems to have continued aging apace, remaining the doddering old fool he always was. The alcoholic robot Bender (John Dimaggio) hasn't really grown up, but he has changed over the years, remaining criminal but growing a sense of self-pity. Amy (Lauren Tom) has graduated from college, gotten married, and has three newt-like children with her invertebrate husband Kif (Maurice Lamarche). 

Throughout the show,...