The Ingalls leave Walnut Grove and the Carters move into their old house. Meanwhile Nellie returns to Walnut Grove and Nancy runs away because she is no longer the center of attention. These are just a few of the moments from the ninth season.

Tells the story of one of the world's great ecosystems and its transformation from natural landscape to farmland. The tallgrass prairie was once a prominent feature of the North American continent that was reduced, in less than a century, to the vanishing point.

Jacob's farm is in trouble from a severe drought. Jacob and Sarah begin to wonder if Sarah can stay, and what will happen to Jacob if she and the children have to leave the farm.