Deliberate mistake: When Wonder Woman is bouncing around in the padded room, there's one part where you can tell the stunt double is not Wonder Woman.
Mind Stealers from Outer Space: Part 2 - S2-E11
Continuity mistake: Wonder Woman exits her place through the balcony, but she suddenly jumps out of the window.
The Man Who Made Volcanoes - S2-E9
Revealing mistake: When Wonder Woman is about to be crushed by the moving wall, one can see the white edge of the set on the left.
Mind Stealers from Outer Space: Part 1 - S2-E10
Continuity mistake: The doctor's arms change positions, and holds a stethoscope that disappears and reappears as he speaks with Diana Prince.
Audio problem: Hamlin Rule, the bad guy in this episode, is a singer. When he sings, his lips frequently don't match the words being sung.
Continuity mistake: When Steve lands his plane, all you can see in the background is what looks like a wide open desert. However, when he comes to a stop, the jet is now in the middle of a completely different background and there was not sufficient time for it to go from the desert to this location in such a short distance.
Audio problem: When Hamlin Rule is playing the flute by the pool, he stops playing it, but the music continues even after the flute is away from his lips.
Continuity mistake: When Wonder Woman tries to escape from the building, she's in the room with the padded floor and walls. Her heels are missing from her Wonder Woman boots, but they were on when she was in the hallway.
Revealing mistake: When the toy aeroplane, which is supposed to be remote-controlled, attacks Wonder Woman, in a closeup shot you can see the wires which are actually controlling it.
Mind Stealers from Outer Space: Part 1 - S2-E10
Revealing mistake: Before the red truck goes over the cliff, skid marks from previous takes are on the road where the police car is.
Continuity mistake: The amount of liquid in Diana's glass during the cocktail scene fluctuates inconsistently, depending on the camera angle.
The Girl from Ilandia - S2-E21
Revealing mistake: After Wonder Woman escapes from the glass tube, she's suddenly replaced by an obvious stunt double who bears little resemblance to her.
The Girl from Ilandia - S2-E21
Continuity mistake: When Wonder Woman and the dog reach the cliff, the close-up shots show them against a blue backdrop that doesn't match the actual outdoor setting.
Continuity mistake: Diana is initially seen wearing a dark brown short-sleeved dress, but when she picks up the coffee, the dress inexplicably appears grey.
Continuity mistake: When the episode begins, the people around the ping pong players change between shots. For example, look at the man in the brown swimsuit—he goes from walking into the pool to suddenly stepping out from the opposite end.
The Girl from Ilandia - S2-E21
Character mistake: Wonder Woman warns Tina not to be trapped by a falling net on top of her. The problem is, Tina has missed her mark and is two metres away from the net, so she has to run and stand below the net to allow for the action scene to develop properly, which is absurd.
The Girl from Ilandia - S2-E21
Continuity mistake: The huge tube where Wonder Woman is encased in suddenly disappears.
The Girl from Ilandia - S2-E21
Continuity mistake: When Wonder Woman arrives at the cliff searching for Tina, there are two mistakes: First, the dog stands on her right side. Then he barks offscreen, but Wonder Woman looks at her left side. Second mistake: the dog walks ahead towards the beach shore to search for the girl, but in the immediate wide angle, he is turning around, walking behind Wonder Woman.
The Girl from Ilandia - S2-E21
Continuity mistake: When the bad guys abduct Tina, check the concrete ground: it's made of one clear and one dark block. The dog keeps changing positions in every shot.
The Girl from Ilandia - S2-E21
Revealing mistake: When Wonder Woman tosses balls at Tina for her to stop them mentally, the edge of the protective glass in front of the girl is visible, plus there is a yellowish reflection that wobbles every time the ball hits the glass.
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.