Mary is expecting a child. Mary is able to get Adam closer to his father because of the expectancy of a child. His father even suggests that Mary and Adam come live with him. After Mary has a miscarriage, Mary and Adam really find out that Adam's father only wanted to be with Adam because of the baby. They decide to remain in Walnut Grove.
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 .