Visible crew/equipment: At the beginning of the episode, Jeannie is talking on the phone by the stairs and her sister is hiding behind the banister. Her sister stands up for a moment and shows her full face, revealing that it is actually Barbara Eden's stand-in wearing the green costume.
Continuity mistake: Throughout this episode, the coat rack behind Major Nelson's front door alternates between having a coat of arms decoration in the middle or nothing in the middle. It seems this episode was filmed while a set change was taking place, since previous episodes feature a hand holding a bell as the center decoration for the coat rack and following episodes feature the coat of arms decoration.
Factual error: At the end of the episode, Major Nelson leaves his Cocoa Beach, Florida, house and drives down the street. Behind the house at the end of the street (which is the home used for the Stephens family on "Bewitched"), there is a mountain. There are no mountains in Cocoa Beach.
Plot hole: As Jeannie is walking down the aisle with Dr. Bellows, she sees the first photographer about to take a photo. A second before the photo is snapped, she blinks in the mannequin, which can be photographed. Later, though, when Jeannie and Tony are watching the film of The Wedding, the mannequin is not visible, either. In the film, the photographer can be seen snapping that first photo (at this point, Dr. Bellows is walking down the aisle with the mannequin), but the film still shows Dr. Bellows walking down the aisle alone.
Visible crew/equipment: When Jeannie is swinging outside on Major Nelson's patio, the top of the soundstage and the ropes holding up the backdrop are visible when the camera switches to a low angle. A moment later, it is visible again, but only for a second. (00:09:40)
Revealing mistake: During the episode Tony and Roger are dropped in the desert to see how they can survive for a week. At one point Tony orders Jeannie to stop interfering. She pops out and Tony spots a "large cat" up on a rock. Close up of the cat, shot of Tony picks up rock, shot of cat leaping. You can see a rope tied to the cat.