In Pixar’s Cars, Doc Hudson is the retired racer who serves as Radiator Springs’ veteran judge and doctor.
Doc is introduced as the town’s respected medical professional, but his past is gradually revealed through newspaper clippings and racing memories. He was once the Hudson Hornet, a three-time Piston Cup champion whose career ended after a serious crash and a dismissive response from racing officials.
The character’s story connects the fictional world of Cars with real American stock-car history. The Hudson Hornet was an actual automobile associated with early NASCAR success, and the film’s Doc draws on that legacy. His voice was performed by actor Paul Newman, himself a noted racing enthusiast and competitor.
Doc is sometimes remembered only as Lightning McQueen’s mentor, but his role is broader: he is the town’s doctor, judge, former champion, and keeper of its racing history. His blue Hudson Hornet design distinguishes him from the town’s other residents.