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.
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.
Factual error: In several episodes where Tony Nelson is in a space capsule and communicating with Cape Kennedy personnel via radio, he ends his calls by saying "Over and out." In radio communications, "Over" means "I am done talking. Please respond." "Out" means "I am done talking and I am ending this communication." The two words are used individually, never together.
Continuity mistake: As Tony is suiting up for his mission, he's talking to the General (who happens to be the father of his fiancee). The General says that when Tony returns they will have a bachelor party for him. Tony is wearing a wedding ring, in later scenes he has none.
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.
Continuity mistake: When they are in the park, Roger is sent to the phone booth to call Jeannie, but ends up having a conversation with the operator. When Dr. Bellows pulls up, the phone booth is empty. Yet, a few minutes later, Roger is shown still in the phone booth. Because he mentions the original reason for his call, it is clear that this is supposed to be the same conversation.