This episode was filmed on July 16, 1965. (edit) Paul Lynde makes his first appearance as Uncle Arthur in this episode. (edit)

Darrin: Hi, Mom.
Endora: How are you, Darrin?
Darrin: Darrin?
Endora: The name is unfamiliar to you?
Darrin: No, but I thought it was unfamiliar to you?
Endora: I’ll make an agreement with you. I’ll try to remember your name if you promise never to call me "Mom." (edit) (Samantha, Darrin, Endora and Arthur are together, drinking coffee)
Uncle Arthur: Cream, Darrin?
Darrin: Yes, please.
Uncle Arthur: (he creates instantly a cow by magic) Help yourself. (gets amused) Forgive me. I just can’t help milking a joke. (edit) Samantha: ...after all you’ve done to him.
Endora: (acts very innocently) What have I done to him?
Samantha: If you’d like me to start at the beginning. On our wedding night you put him into the hotel lobby in his pajamas. (starts counting with fingers) Then...
Endora: I mean recently?
Samantha: How recently?
Endora: Well, we won’t go into that. (edit) Samantha: (refers to uncle Arthur) He’s my favorite uncle. Do you know, when I was little, he thought me to make my first pony. […] I was only four. I couldn’t get the spell right. (edit)

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Uncle Arthur’s quote "One morning I shot a lion in my pajamas. Now, what he was doing in my pajamas, I'll never know!" has been used at least in 1930 by Groucho Marx as Captain Spaulding in Animal Crackers. (edit)