The Professor is a common generic name for fictional characters who fill the role of doctors, scientists, or mad scientists. While most characters identified as "the Professor" usually have a longer name, this generic title is the most commonly used.
Famous characters identified as "the Professor" include:
William Crimsworth in Charlotte Brontë's novel The Professor
Professor (Futurama), from the TV series Futurama
The Professor (Gilligan's Island) from the TV series Gilligan's Island
Professor Utonium from The Powerpuff Girls
The Professor from the Felix the Cat cartoons
The Professor from McDonaldland
Professor Digory Kirke of The Chronicles of Narnia series
The Professor from The Bourne Identity
Professor (Spyro character) from the Spyro the Dragon video game series
Professor Maximillian Arturo, from the TV series Sliders
Professor Ernst Lodz from Carnivàle
Professor Oak from the Pokémon anime series
During the last couple of seasons of the original Doctor Who TV series, Ace habitually addressed The Doctor as "Professor".
The Professor, a character in the stage shows of rock band The Aquabats and the TV series The Aquabats! Super Show!
Emmett Brown from Back to the Future
Albus Dumbledore from the Harry Potter series