John Doucette appears as Boone Gilla, who tells Charlie the story of the Donner Pass tragedy. Fourteen years later, Mr. Doucette will star as George Donner in the TV movie Donner Pass: The Road to Survival (1978).
There are no guest stars listed in the opening credits. The only "name" guest is John Doucette, and even he isn't listed.
Wagon Train Tracker: Disregard the other wagon scouts who claim their train is "50 miles north of Hale's heading to Oregon through the Great Salt Flats" - that would put Hale's in the middle of Utah, nowhere near any transcontinental trail. Depicted terrain and geographical reference put the train clearly heading west on the California Trail, in the desert and mountain approach to Donner Pass in the Sierra Nevadas.