Mr. Edwards and Doc Baker help a nearby town with an epidemic case of mountain fever. When Mr. Edwards returns, a quarantine is placed on Walnut Grove. Alicia, Mr. Edward's adopted daughter comes down with the disease. Mr. Edwards tries to help his daughter. Laura, not knowing about the disease, goes to visit Alicia and Mr. Edwards. Laura ends up taking care of the both of them while they recover.
Elenco: Melissa Gilbert , Michael Landon , Lindsay Greenbush , Sidney Greenbush , Melissa Sue Anderson , Richard Bull , Jonathan Gilbert , Kevin Hagen , Matthew Laborteaux , Dean Butler , Dabbs Greer , Karen Grassle , Katherine MacGregor , Ruth Foster .