When Ben awakes during surgery and the camera goes to his face, Jack is at his right side. Then in the next shot, he is at his left side.
In the operating room scenes with Jack, Juliet's surgical cap moves up and down her forehead. During this time, her gloved hands are bloody, so if she had made an adjustment to her surgical cap manually, there would be blood visible on the cap like the blood that is visible on her surgical mask from when she pulled that down off her face.
The bus that runs over Juliet's ex-husband, supposedly in Miami, has the color scheme and unique rainbow decals found only on the public bus system in Honolulu where the show is filmed.
During surgery, the audio pips of Ben's heart rate do not match his heart rate on the screen monitor.
When Richard Alpert pitches his company to Juliet, each time he uses the remote control and the image changes, the digital video projector on the table makes the noise of an old slide projector advancing a slide.