That time the 'Wicked Witch of the West' stopped by to see Mister Rogers (1975)

To show kids that she was just a nice person playing a wicked witch, Wizard of Oz actress Margaret Hamilton dropped by Mister Rogers' neighborhood in 1975. Hamilton, a former kindergarten teacher, talked with Rogers about how she dreamed of being a witch when she was a girl and was 'thrilled' when the part was offered to her as an adult.
'Sometimes, Mister Rogers, I'm a little unhappy because lots of children are quite scared by her and that always makes me feel a little sad.'
(Rusty's Electric Dreams)