In Part four “Prairie Thunder” the Buffalo Hunters from Dodge City establish a new settlement along Adobe Creek called Adobe Walles. The hunters are waiting for the big herds to arrive while Billy Dixon explores the territory for the movement of the spring buffalo herds. As the hunters are returning back to camp from a long days hunt they encounter a fierce thunderstorm. The story narrated by Brad Smalley describes how the lightning is so intense that it starts a buffalo stampede. The story concludes by unfolding how the hunters escape the running buffalo and how Billy Dixon losses his mules in the river.