The Bermuda Triangle Crisis - S2-E4
Continuity mistake: Steve and Diana steal wrinkled uniforms from a clothesline. However when they put the uniforms on, they're perfectly pressed.
Judgment from Outer Space: Part 2 - S1-E11
Audio problem: Wonder Woman whistles inside Andros' ship, but her lips do not open slightly. They remain closed.
The Feminum Mystique: Part 1 - S1-E5
Continuity mistake: When Drusilla changes into Wonder Girl for the first time, if you look at the ground while she's changing, you can see the leaves instantly change positions all around her.
Wonder Woman vs Gargantua - S1-E7
Continuity mistake: When Diana changes into Wonder Woman in Dr. Osmond's lab, the green stool jumps from one location to another in the process and the silver stool disappears.
The New Original Wonder Woman - S1-E1
Continuity mistake: The plane that the German is flying is an American plane, and there are obviously two different model of planes being used through the scene.
The Bermuda Triangle Crisis - S2-E4
Continuity mistake: After Wonder Woman gets Steve out of the tree, you can see a big shrub in the foreground on the right side of Steve's body. When the camera changes angles, the shrub is suddenly gone.
The Bermuda Triangle Crisis - S2-E4
Continuity mistake: Steve's parachute moves around, even though it's flat on the ground and no one moved it. After Wonder Woman rescues Steve from the tree, Steve is laying on the ground motionless and unconscious. His parachute moves around between the time Wonder Woman walks away and Diana returns, even though nothing could have moved it. It wouldn't be so obvious, except that the material is red and white, so when it changes, you can really tell.
Continuity mistake: When Mariposa is skydiving out of the plane, any time he's seen from afar, he's wearing a black oxygen mask. When the camera is closer to Mariposa, he's not wearing a mask. However, when he lands, he is wearing a mask.
Revealing mistake: When Wonder Woman (Diana) uses her bracelets to dodge bullets, the many sparks that the bracelets emit, as the bullets hit, are controlled by wired remotes held in Lynda Carter's hands. They are quite visible in her fists in many episodes. Small red bits around the circumference of the bracelets also appear, which provide the flashing spark special effects.
Visible crew/equipment: After Wonder Woman rescues Nadia's boyfriend by tossing the two bad guys off screen, you can see the shadow of a stage hand adjusting a prop of some kind. This can be seen directly behind Wonder Woman as she's grabbing the rope to go and tie the two bad guys together.
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.
Visible crew/equipment: When Joe Atkinson walks into Steve's office and comments that during WWII he "was wrapped in a cloak and carrying a dagger for the OSS," in the next shot the shadow of the boom mic is moving on the wall, at the top right corner of the screen.
The Return of Wonder Woman - S2-E1
Revealing mistake: After the steward releases the gas on the jet everyone passes out, and in the second exterior shot of the jet as it rocks from side to side, we can see the circular frame of the window from which the jet was being filmed, at the bottom right corner of the screen (this shot is flipped).
The Return of Wonder Woman - S2-E1
Revealing mistake: During the scenes on the jet with Steve and the others, before landing on Paradise Island and when the Amazon women are aboard, the end of the cabin and cockpit sets are visible at either the right or left side of the screen in some shots. (Widescreen version).
Audio problem: Harlin 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.
Wonder Woman Meets Baroness Von Gunther - S1-E2
Other mistake: When Wonder Woman is chasing the Baroness, she lassos her with her magical lasso. When she gets the lasso around the Baroness, Wonder Woman tugs on the lasso, but this pushes the Baroness in the exact opposite direction and into the swimming pool. Just before she falls in, you can even see the tension from the tug pulling her in the opposite direction, yet she falls in the opposite direction anyway as if she's been pushed, not pulled.
Audio problem: When Harlin 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.
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.