Think of the irony here regarding the incredible Agnes Moorehead.  Several people have commented on the classic Twilight Zone story, "The Invaders" in which she was the only actor and had no lines of dialogue, yet here she is in a radio drama in which there is nothing but dialogue!  And is absolutely terrific in both.  That takes a special kind of talent and she had it.  Considering some of the roles she had, she must have considered playing Endorra on "Bewitched" as an absolute lark.  I know she and Dick York, the original Darren, struck up a great friendship and she was extremely upset when he had to leave because of his problems with his back.
