Cars introduced Doc Hudson, the retired racer voiced by Paul Newman.
Doc is the town physician and judge of Radiator Springs, but he is secretly the Fabulous Hudson Hornet, a celebrated racing champion. His past explains both his skill and his reluctance to discuss racing with Lightning McQueen.
Paul Newman provided Doc's voice in Cars, his final feature-film voice performance before his death in 2008. The character is modeled on the real Hudson Hornet, a car that achieved major success in early stock-car racing. Doc is not merely an elderly local mechanic: the film gradually reveals that he once won three Piston Cups.