James and Cassandra's uncle, who wanted nothing to do with the children following their parents' deaths, arrives unexpectedly in Walnut Grove and takes an interest in them. But it turns out he's interested in custody of them as well.moreless
Harriet is pressed to transform the Walnut Grove restaurant into a chain called "Mrs. Sullivan's." Meanwhile, Charles is left to gather the slack at home with Caroline so in-demand as one of the cooks.moreless
Carrie tags along for a school assignment, but Mary and Laura fail to keep a close eye on her. Their little sister wanders off and falls into an underground mine shaft.
Now that her beloved horse Bunny has officially been returned to her, Laura eagerly prepares to enter a local race. Angry and jealous about this, Nellie throws a tantrum until Harriet agrees to buy her an expensive thoroughbred from Sleepy Eye.moreless
Thrush agent L.C. Carson uses an Indian reservation as a front for his plan to assemble a hydrogen bomb, and kidnaps the tribe's chief, High Cloud, to ensure cooperation. Solo arranges for the Chief's daughter Charisma to return, but she ends up being kidnapped along with Solo and Illya, who is disguised as an Indian. Solo and Illya, along with a band of young Indian warriors on motorcycles, encircle Carson and his men and try to stop them before its too late.moreless