Little House on the Prairie Season 4 Episode 22

Overview
Charles and Caroline sign Mary up for the blind school in Iowa. At first, Mary is very reluctant to learn anything at the school. However, after being with her teacher, Adam Kendall, for a while, she turns her outlook on life around. Mary is such a great student that Adam asks her to help her teach at a blind school with him.
Director: William F. Claxton
Guest Star: Alison Arngrim, Charlotte Stewart, Dabbs Greer, David Opatoshu, Hersha Parady, Jonathan Gilbert, Karl Swenson, Kevin Hagen, Linwood Boomer, Merlin Olsen, Patrick Labyorteaux, Ruth Foster
Episode Title: I'll Be Waving as You Drive Away (2)
Air Date: 1978-03-13