This episode was originally written with Aunt Clara in Uncle Arthur's part but was rewritten following Marion Lorne's passing.
Although David White looked older (he was actually 52 here), Larry Tate reveals himself to be 47 yrs old.
First episode where the term Atmospheric Continuum is mentioned.
This episode features scenes shot "behind the scenes" at the actual Columbia/Screen Gems soundstage where Bewitched was filmed. When the Napoleon character steps out of his trailer, there is a large box labeled "Byron Munson" beside it. Indeed, Byron Munson was a crew member in the Costume Department for 114 episodes of Bewitched.
The only reason why Samantha was holding celery at the end, it's because it stood up beautifully against her emerald green dress. The lovely contrast brought out the blue in the bouquet of celery.