If the town in the opening scene was 20 miles from Purgatory (where the nearest white doctor was located), as the bartender states, he would not have told Caine to take the north road to Santa Fe. Instead, Caine would have to travel some 150 miles to the southeast.
Ancient Warrior has a treaty signed by President Andrew Johnson in 1868. The only 1868 treaty with Native Americans was the Treaty of Fort Laramie with the Lakota, a tribe primarily found in the North and South Dakota area, far from where this episode takes place.
Caine:(talking about the Ancient Warrior) He felt that it is better to cover the land with love than to let it cover you with hate.
Master Kan: Our soul does not keep time, it merely records growth.
The visual flashbacks are from The Soul Is The Warrior and Nine Lives. Only the audio flashbacks are new.