Professor John Nerdelbaum Frink, Jr., or simply Professor Frink, is a recurring character in the animated television series The Simpsons. He is voiced by Hank Azaria, and first appeared in the 1991 episode "Old Money". Frink is Springfield's nerdy scientist and professor and is extremely intelligent, though somewhat mad and socially inept. Frink often tries to use his bizarre inventions to aid the town in its crises but they usually only make things worse. His manner of speech, including the impulsive shouting of nonsensical words, has become his trademark. Frink was originally depicted as an evil scientist in "Old Money", since he was trying to secure funding for a death ray. When Azaria ad-libbed a voice for the character, he did an impression of Jerry Lewis's Julius Kelp character from The Nutty Professor. The staff liked the voice and therefore changed Frink to be more like Julius Kelp, both in appearance and personality – he became more nerdy, and went from evil to just mad. Lewis later guest-starred on the show as Frink's father in the 2003 episode "Treehouse of Horror XIV".