Former racing champion turned Radiator Springs physician and judge.
Mack's racing support role is replaced by Doc's leadership.
Doc takes over from Mack as Lightning's crew chief during the final race.
They are connected through the Radiator Springs community.
Mater and Doc are both identified as residents or central members of Radiator Springs, whose community responds together to Lightning's departure and...
Doc exercises legal authority over Lightning in Radiator Springs.
Doc Hudson judges Lightning's case after Lightning damages Radiator Springs's main road and sentences him to community service.
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Related entry on Wikidata (Q9289752), public domain (CC0).