Margaret Hamilton, who played the Wicked Witch of the West on The Wizard of Oz, appeared on Mister Rogers' Neighborhood in 1975 in an effort to convince children there was nothing to fear. https://t.co/ieJzG6C3Qq https://video.twimg.com/amplify_video/1799003678780850177/vid/avc1/640x486/gRVdUcjuL0cGrZeu.mp4?tag=16