King of the Hill

The Unbearable Blindness of Laying (2x11)

Air date: Dec 21, 1997

Hank's mother comes to visit for Christmas with her new boyfriend, Garry. When Hank walks in on his mother and Garry having sex, he goes blind. Garry figures out the problem, and tries to help regain his sight, and they end up at a Faith Healing Church for answers.