Joe introduces himself to Mr. Douglas and acts surprised to find out that Douglas is an attorney, despite having met and learned of Douglas' occupation in the first episode of "Green Acres," which aired a week before this episode.
At the beginning when Uncle Joe walks into Sam's store, Edgar Buchanan apparently flubs his line. He says, "Morning, Sam!" to which Drucker replies, "It was until you walked in." Drucker's response really didn't make sense, unless Buchanan was supposed to say, "*Good* morning, Sam."