Little House on the Prairie S09 E04 Rage

"Together, a pioneering family faces a crucial test of its courage and its love!"

Mr. Stark has gotten himself so far in debt that he has lost his mind. He goes home and shoots his wife and daughter. Then he goes off and ends up at Laura's house. He mistakes Laura and Jenny for his wife and daughter, but when he sees Rose, he thinks that his daughter has had a baby.