Jennifer Rhodes is well known for many iconic roles, such as Grams on Charmed and recurring roles on shows such as Third Rock From the Sun.
Before that though, she had a couple of guest roles on Little House on the Prairie.
The first was as a small appearance as a nurse in the episode The King is Dead. But in the second episode, you had a much more substantial role as Mrs. Hale in the episode No Beast so Fierce. She played the mother of a young boy named Gideon who had a stuttering problem.