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 a bit of set equipment is visible at the left side of the screen (widescreen version).
The Feminum Mystique: Part 2 - S1-E6
Revealing mistake: When one of the Nazis brings Drusilla a hot meal while she's being held in the deserted warehouse, in the shot just as she whacks him in the stomach we can see the stunt cable over the Nazi (stunt double) which lifts and pulls him back.
The Feminum Mystique: Part 2 - S1-E6
Other mistake: When Captain Radl is parachuting into the water, the episode's onscreen textbox reads, "Elsewhere in the Carribean, a Nazi rendezvous is occuring," but the proper spelling of the words are "Caribbean" and "occurring."
Answer: The transformation twirling was invented for the 1970s TV series only, to explain her quick change from Diana Prince to Wonder Woman. However, it would have been nice to do a little spin homage in the movie.