Zany Uncle Arthur moves into the Stephens household, wanting to be near baby Tabitha. Enter Endora, who accuses Arthur of being a bad influence on the child. When Arthur makes the same charge against Endora, she decides to move in as well -- and woe betide poor Samantha and Darrin. Paul Lynde, still billed as "special guest star," makes his second series appearance as Uncle Arthur. First telecast on October 20, 1966, "Endora Moves in for a Spell" was written by Ruth Brooks Flippen.
by Hal Erickson synopsis