In Pixar's Cars, the retired racing champion revealed to be Radiator Springs's judge and doctor is Doc Hudson.
Doc initially presents himself as a stern local authority who wants Lightning McQueen to leave town. As the story develops, Lightning discovers that Doc was once the Fabulous Hudson Hornet, a three-time Piston Cup champion whose career ended after a crash and an unfairly short-lived recovery period.
The character combines two roles in the town: he serves as its judge and acts as its physician. His hidden racing history explains his bitterness toward the modern racing world and his reluctance to discuss his past.
Doc Hudson is voiced by Paul Newman, whose own association with automobile racing added resonance to the role. The character is inspired by the real Hudson Hornet, a car known for its success in early-1950s stock-car racing.