Raquel Welch (as the Stewardess) is only seen from the rear and partially from the side; not full face.
The gown being modeled in the Paris fashion show was worn in a later episode by Samantha, and reused again by Barbara Eden in "I Dream of Jeannie".
The first time Endora meets Larry and Louise Tate.
The last line of dialogue was Endora's as she sits outside, on the end of the plane: "It's the only way to fly." This is a reference to a popular TV commercial for Western Airlines where a cartoon bird (nicknamed Wally and voiced by Shepard Menken ) sat on the end of a Western Airlines jet, sipping champagne and saying, "Western Airlines, the ooooonly way to fly."
On the headboard of Samantha and Darrin's bed is a copy of "So to Speak: A Practical Course to Develop Personality and Power Through Effective Speech," by Elisabeth Ferguson von Hesse. It's a book that was popular for actors in the 1960s.