The Girl from Ilandia - S2-E21
Revealing mistake: When Tina and Wonder Woman rate each other's jumps, in the close-ups the background is an obvious blue backdrop that doesn't match the exterior gardens they are at.
The Girl from Ilandia - S2-E21
Revealing mistake: When Tina jumps out of the window, she is a young girl. When she runs away (and all further jumps and stunts in this episode), she is replaced by an adult, taller stunt.
The Man Who Wouldn't Tell - S2-E20
Revealing mistake: When Wonder Woman breaks the door handle in the car, the close-up shot of the second handle she breaks is the previous close-up shot but reversed: she is using her right hand, which swaps to the left hand in the close-up, plus her arm position doesn't match her body's.
The Man Who Wouldn't Tell - S2-E20
Revealing mistake: When the lab is about to explode and the room shakes wildly, none of the stuff moves, revealing the camera trick.
The Man Who Could Not Die - S3-E22
Revealing mistake: When Bryce shows up at Dr. Akers' place and asks for the briefcase, he is replaced with an obvious stunt double, chubbier and with a funny big wig.
The Man Who Could Not Die - S3-E22
Revealing mistake: Obvious fireproof gear and a mask when Bryce escapes from the fire.
The Man Who Could Not Die - S3-E22
Revealing mistake: When Wonder Woman jumps towards the window engulfed in flames, the fire moves backwards inside the building, revealing how the jump and the scene were really shot.
Revealing mistake: When George hangs upside down on the building ledge, the safety cable holding him is visible.
The Girl with a Gift for Disaster - S3-E19
Revealing mistake: When the gas truck crashes against the blue car, it already has a dent on the door. After the crash, the dent disappears and the door gets fixed.
Revealing mistake: When old Mary Jane Thrip kicks the bad guys' ass and runs away, her younger stunt's face is visible.
Revealing mistake: Visible ramp to allow Wonder Woman to jump over the van.
The Richest Man in the World - S3-E17
Revealing mistake: When Wonder Woman pushes the gunman off the beam, he falls on a very evident crash mat covered with a black canvas.
The Richest Man in the World - S3-E17
Revealing mistake: During the chase, when the car overtakes a red car, Henshaw's stunt is noticeable because of his bulky wig.
The Richest Man in the World - S3-E17
Revealing mistake: During the car chase scene, skid marks from previous shots are everywhere. (00:32:13)
The Richest Man in the World - S3-E17
Revealing mistake: When Henshaw and Barney's chase starts, there's a shot inside the car where it's painfully obvious that the car is not moving at all. Check how the reflections on the hood are perfectly still, for example. (00:32:08)
The Richest Man in the World - S3-E17
Revealing mistake: When Wonder Woman is chasing the guy at the factory, their stunt doubles are noticeable.
Revealing mistake: Wonder Woman is in a control room with walls and a hard floor, but when she starts jumping around to avoid the lethal red light, the walls and floor swap to wrinkled and bending inwards, revealing it's a room covered with safety mats.
The Richest Man in the World - S3-E17
Revealing mistake: Skid marks from previous takes are on the dirt next to the cliff where the van heads to.
The Richest Man in the World - S3-E17
Revealing mistake: The upper edge of the set is visible during the event. (00:02:55)
The Starships Are Coming - S3-E15
Revealing mistake: When Wonder Woman is fighting against all of the thugs, one with a brown shirt and a pair of jeans is knocked out, but her punch misses by far.
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.