The Richest Man in the World - S3-E17
Other mistake: When Wonder Woman chases the guy in the factory, all of the scenes of her jumping plus the last scene of the guy running away and her jumping on top of him are reused from S2E17.
The Richest Man in the World - S3-E17
Other mistake: When Wonder Woman chases the guy in the factory, all of the scenes of her jumping plus the last scene of the guy running away and her jumping on top of him are reused from S2E17.

The Feminum Mystique: Part 2 - S1-E6
Visible crew/equipment: After the Nazis are defeated on Paradise Island, Queen Hippolyta tells her daughters that she has plans for those Nazis, and at the start of the next shot the set equipment's c-stand is visible at the left side of the screen (widescreen version).
Question: Why did they have three actresses playing Hippolyta? Scheduling conflicts with each one?
Answer: It is typical to recast non-regular cast members in a TV series, usually because they are no longer available or another actor was better suited for the part. Non-regular actors move on to other acting jobs during a series' run. Cloris Leachman, Carolyn Jones, and Beatrice Straight, who played Hippolyta, were well-known character actresses who were billed as "Guest Stars." Cloris Leachman was only in the show's pilot episode and was on the Mary Tyler Moore Show. Carolyn Jones played Hippolyta during Season 2, then was cast in the TV mini-series "Roots." Beatrice Straight played Hippolyta in the final season.
Answer: The first actress, Cloris Leachman appeared in the TV movie which ended up being the pilot for the series. At the time, Leachman was already starring in her own TV series "Phyllis" (a spin off her role in "The Mary Tyler Moore Show"). This was actually the 2nd TV movie meant to be a pilot and the first one wasn't picked up. It's likely she thought the show would be picked up. After season 1, in which Carolyn Jones played the role, ABC was slow to make a decision to pick up the series for season 2 and CBS picked up the series. When CBS picked up the series, they changed the time setting of the show and replaced all the actors, with the exception of Carter and Waggoner (with Waggoner playing a different role technically), resulting in Beatrice Straight being cast.
Bishop73