The Virginian Season 4 Episode 20 The Inchworm's Got No Wings at All

Niles Tait is working at Shiloh to help his family who hides his sister Marcy who is learning challenged. They worry what others will think and have hindered Marcy's learning and socialization. Jennifer learns about her and tries to help educate her taking the place of Niles who sees Marcy as a millstone around his neck and future. Marcy witnesses a murder but tells no one. The issue surfaces when she meets the murderer at her first attempt to attend a party with the help of Jennifer and The Virginian.