[1] The special was retitled Dorothy in the Land of Oz, with some of the references to Thanksgiving cut out, for the CBS repeat in 1981.
Walking to the tower, Dorothy tells Jack Pumpkinhead about Thanksgiving, lauding the Pilgrims' pioneering spirit.
Along the way, they run into more new friends: the Hungry Tiger, who turns out to be a vegetarian, and Tic Toc (sic) the mechanical man.
Ozma rewards Dorothy by bringing her uncle and aunt to Oz forever, so they can have a Thanksgiving feast for all of their Ozite friends.
[1] In A Brief Guide to Oz, Paul Simpson wrote, "This animated special isn't well regarded, even though it incorporates some elements of the original Baum saga that rarely turn up elsewhere.