Thundering Hoofs

S1 E2: Four members of a wagon train survive an Indian attack, in which True Eagle, a Sioux medicine man is killed and his sacred arrow stolen. Young Wolf, True Eagles's grandson, and "Keen" Blade, a white renegade, search for the arrow. Three of the four survivors have been murdered. Major Trent, the fourth survivor and possessor of the arrow, returns with his daughter, Barbara and Bobby Nelson, an orphan, to find the cave of gold the arrow reveals.