Doc Hudson, aka The Fabulous Hudson Hornet, is the Radiator Springs judge and local doctor. Once a famous racing legend known as the "Fabulous Hudson Hornet" Doc now lives at Radiator Springs after a serious crash that put him out of season and ended his interest in racing. However, thanks to Lightning McQueen and the folks of Radiator Springs, Doc chose to work as McQueen's crew chief and he got a pleasant fanfare from the audiences as a result.
- Doc Hudson/The Fabulous Hudson Hornet was voiced by the late Paul Newman.
- Doc will meet the FT Squad in The FT Squad's Adventures in Cars. Sometime in the future, he'll join the team on their adventures, along with McQueen, Mater and Sally.
- Doc made a minor appearance in an episode of The FT Squad's Adventures With Phineas and Ferb.
- Doc will meet Winnie the Pooh, Princess Twilight Sparkle, Ash Ketchum, Littlefoot, Alex, Skipper, SpongeBob, Tommy and their friends in Pooh's Adventures of Cars.
- Doc will meet Simba and the Jungle Adventure crew in Simba, Timon, and Pumbaa's Adventures of Cars.
- Doc will meet Danny and his friends in Danny's Adventures of Cars.
- Doc will meet Ryan, Crash, Thomas and their friends in Ryan's, Thomas' and Crash's Adventures of Cars.