Diana changes first into her Wonder Woman uniform and then into her wetsuit while aboard a boat. The background of the shot in her standard uniform is not the boat cabin, but a blank wall.
When Diana spins into Wonder Woman inside the vault, the camera setup changes drastically. Before the flash, there is an object to the left of the screen. After the flash, that object is gone, the right of the screen now shows the sarcophagus and an alarm bell, and the lighting is very different.
When Diana dives off the boat at the beginning of the episode, she is very obviously diving into a swimming pool.
When Diana jumps over the electrified fence, you can see the crew member in the blue shirt who is there to catch the actress/stunt woman in case of accident.