“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!”
―Dr. Delbert Doppler
Dr. Delbert Doppler is a major character in Disney's 2002 animated feature film, Treasure Planet. He is an alien with the appearance of being some kind of dog/human hybrid, and a notable and well-off astronomer. Doppler is also the best friend of Sarah Hawkins, and becomes the guardian of her son, Jim Hawkins, during the expedition to find Treasure Planet.