Watch Little House on the Prairie Season 4 Episode 21 Online
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- COUNTRIES: United States of America
- Subtitles: English
Mary falls in love with Seth. When Mary's eyesight starts to get worse, Charles takes her to a specialist. He is devastated when the specialist tells him that Mary will lose her sight. Charles is unable to tell Mary for a while that she is going blind. When Mary does go blind, the whole family suffers.