The first Disney film in which the maquettes (small character reference sculptures) were not made entirely by hand, out of clay. Silver's cyborg parts were constructed out of plastic, using laser technology.
Doctor Doppler: Dang it, Jim. I'm an astronomer, not a doctor! I mean, I am a doctor, but I'm not that kind of doctor. I have a doctorate, it's not the same thing. You can't help people with a doctorate. You just sit there and you're useless!