Doc Hudson is the legendary race car revealed to be Radiator Springs' retired judge and doctor in Pixar's Cars.
Doc is a 1951 Hudson Hornet who once raced under the name Fabulous Hudson Hornet. He won three Piston Cup championships before a crash ended his competitive career. After leaving racing, he settled in Radiator Springs, where he served the community as its judge and physician.
Doc initially resents McQueen's careless attitude toward racing and refuses to become his crew chief. Their relationship changes as McQueen learns patience and respect. Paul Newman voices Doc Hudson, making the character especially notable because Newman was also a celebrated real-world racing enthusiast.
The film's story uses Doc's past to connect its fictional racing history with the real Hudson Hornet's reputation in stock-car racing. Doc is not the Piston Cup's current champion; Strip “The King” Weathers holds that distinction at the start of the film.