|Make: 1951 Hudson Hornet|
|License Plate Number: 51HHMD|
| Occupation: Race car|
Radiator Springs judge and doctor
Lightning McQueen's crew chief and mentor
|Allies: Lightning McQueen, Mater, Sally Carrera, Sheriff, Fillmore, Sarge, Luigi, Guido, Ramone, Flo, Red, The King|
|Enemies: Chick Hicks|
|Voiced by: Corey Burton|
Doc Hudson (also known as The Fabulous Hudson Hornet) is one of the two deuteragonists in the Cars series. He is a 1951 Hudson Hornet. He is the judge and doctor of Radiator Springs, as well as a former race car.
Doc is the wise, quiet country doctor who runs Radiator Springs' medical clinic. Before slowing down in Radiator Springs, he was the Fabulous Hudson Hornet.
Doc is portrayed as a grumpy old man who wants to leave his racing career behind, and stay out of the public line. Doc enjoys peace and quiet, and often isolates himself from the other Radiator Springs residents, instead choosing to stay inside of his clinic and garage.
Doc Hudson is based off of the real 1951 Hudson Hornet, which is where his name, number, and paint scheme came from.
During his Piston Cup racing days, Doc was painted in a dark shade of blue, with a chrome bumper and grille. On his doors were the number "51" painted in yellow, as well as the words "Fabulous Hudson Hornet" painted in both white and yellow. He also had the words "Twin-H-Power" on both sides of his hood, and the Piston Cup logo beneath them. Doc also had red racing wheels during his racing career.
After arriving in Radiator Springs to set up his own medical clinic, Doc attempted to hide his past by removing most of his decals, leaving only his dark blue coat of paint and his chrome grille, bumper, and lining.
- Doc's license plate reads "51HHMD", which references to his racing number, 51, his model, the Hudson Hornet, and profession, which is a medical doctor.
- Doc's racing number, 51, is a reference to the first year of the Hudson Hornet's movement, 1951.