Who is Lightning McQueen’s retired mentor in Pixar’s Cars 3?

Doc Hudson is Lightning McQueen’s retired mentor in Pixar’s Cars 3.

Doc Hudson was the original Cars film’s local physician and a former racing champion known as the Fabulous Hudson Hornet. After Lightning arrived in Radiator Springs, Doc helped him understand humility, friendship, and the importance of racing for more than trophies.

Doc died before the events of Cars 3, but his influence remains central. Lightning studies old photographs, recalls Doc’s advice, and tries to honor Doc’s legacy while facing younger racers. The film uses flashbacks and archival-style material to show their earlier relationship.

Smokey becomes an important living mentor in Cars 3, especially during Lightning’s training at Thomasville. That distinction creates a common mix-up: Doc is Lightning’s retired mentor and emotional guide, while Smokey is the veteran racer who trains him in the present-day story.