The Joker Is a Card (S02E05)

Samantha arranges a meeting between Darrin and her mother which she hopes will settle their differences. A series of minor accidents sets Darrin and Endora accusing each other of being practical pokers. Realizing someone else is responsible, Samantha uncovers a serving dish and reveals her Uncle Arthur, who dotes on practical jokes. Infuriated by Darrin's uproarious appreciation of Uncle Arthur, Endora plants a Beatles hairdo on Darrin. (iTunes)