Plot hole: Mrs. Kravitz, while standing in the Stephenses' front doorway, sees Santa Claus and assumes that it's Darrin in costume. However, the very next shot shows Santa exiting the kitchen (around the corner from the front door) and starting up the hallway toward the living room. There is no possible way Mrs. Kravitz could have seen him when she said she did.
Revealing mistake: The hallway that leads to the den and the back door of the kitchen has a door at the end of it, when this door is opened we see what looks like pine trees and mountains, we know that the Stevens have neighbors on that side of the house, so that when the door is opened you can blatantly tell that it is a picture.
Revealing mistake: In several episodes, the window over the kitchen sink is shown from the outside, while snoopy people look in. The window shown in these exterior shots is far too low to be the same window that is over the Steven's kitchen sink, which is shown in many shots looking out.
Add timeSuper Grover
Revealing mistake: In addition to Samantha, Elizabeth Montgomery also played Serena. In scenes where both characters appeared, Elizabeth would face the camera and play one character and another actress, Melody McCord, would play the other with her back to the camera. But in this scene, when Mr. Beams tells Serena she has a luncheon date with her intended at the rotisserie, Melody (portraying Samantha), with her back to the camera, inadvertently turns her head, revealing her face.
Audio problem: When Samantha and Darrin are at his ex-girlfriend's house for dinner, Samantha is doing all kinds of things to sabotage the dinner, even making a gust of wind come through the front door thus blowing the ex's wig off. The ex girlfriend is screaming but the screams don't match up to what her mouth is doing.
Continuity mistake: The minute hand on the teakettle clock is between the 6 and the 7 when it's shown behind Samantha. When she goes to the closet, the clock reads 8:15 (minute hand on the 3). When she returns, the minute hand is between the 6 and the 7 again.
Continuity mistake: In the early shows, the door between the dining room and kitchen is a swinging door with louvers. In later shows there is a regular sized door with partial louvers. However, after this change, there are a couple of episodes within the same season, where the regular sized louver door is a solid door with no louvers.
Add timeSuper Grover
Revealing mistake: Paul Lynde is supposedly "in" the mirror near the front door, but as he waves his arm to cast a spell, the shadow of his arm waving is visible at the far left, revealing he is actually standing off camera at a spot where his reflection is visible. Elizabeth Montgomery also briefly glances at him.
Continuity mistake: Before this episode (and after as well) Darrin and Samantha give their address as 1164 Morning Glory Circle, however in this episode, when Darrin slams the door, the '9' in 192 on their address spins around to make 162, hence the angry neighbor at 162 saying that his grass was installed at the Stevens' by mistake.
Other mistake: Samantha is reading a 4-line note from Endora. The paper is semi-transparent and in a shot from the front, we can easily see the writing through the paper. However, after the note is "twitched" into a second, shorter note, there's another shot from the front - and the lettering looks exactly the same as it did before.
Continuity mistake: When Sam and Endora are talking in the foyer, the glass-paneled door at the end of the hallway is closed. When Darrin is seen in the study moments later fighting to get the chair in the closet, the door can be seen against the wall in the hallway, as it would be in the open position. When Darrin stumbles out of the study a moment later, the door is closed again.
Other mistake: While Gladys Kravitz is standing in front of her house, which is across the street from the front of the Stephens' house, Gladys sees the Stephens' backyard just as Sam zaps a swimming pool and then zaps it away, but since the Stevens' backyard is located behind the house where the living room and dining room are, this would be impossible even for nosy Gladys Kravitz.
Continuity mistake: After Samantha sees the statue talking to her, her expression goes from shocked to annoyed and back to shocked in consecutive shots. Also, her hair is over both shoulders in each of the "shocked" shots but over one shoulder in the "annoyed" shot.
Continuity mistake: When Dave sees Darrin's ad for the community meeting, he suggests a couple of changes, one of them being to add a line saying "and bring your friends". But the ad was shown in close-up shortly before Dave's arrival, and there was already a line saying "Be sure and bring all your friends".
Revealing mistake: At the end of the episode, during Serena and Samantha's second meeting with Mr. Beams, in the wideshots of the two women sitting on the couch and also when they're both poking their heads through the doorway, Serena's body double actually appears face-forward. Additionally, in the closeups of Serena and Sam on the couch, both are played by Elizabeth Montgomery, and we can see the wall's color difference behind them due to the use of the split-screen technique.
Continuity mistake: When Sam is looking for Darrin to tell him the good news, Aunt Clara walks into the living room holding the large book with its cloth bookmark hanging over the top front of the book (facing Sam), but in the next shot the bookmark has switched to hanging over the top back of the book (facing Clara).
Continuity mistake: When Aunt Clara tells Sam not to worry about Darrin because she has her book of spells, there's a closeup of the book with its binding facing left and Clara pointing to the large title "Spells and Incantations" on its cover, but in other shots Clara's holding the book with its binding facing right (we see Vol. 7 on the binding) so the cover is facing the opposite way, and there is no title on the cover.
Continuity mistake: Aunt Clara crashes into the pagoda and is helped up by Darrin and Samantha. They head inside and you can see Aunt Clara's purse sitting in the pagoda to the bottom left. But when all three enter the house, Aunt Clara is now carrying her purse.
01:14:00 - 01:20:00
Revealing mistake: When Samantha and Endora are in Paris reviewing models in dresses, the models are frozen because Samantha and Endora are not supposed to be in the dress shop. One of the models, instead of being frozen, is seen blinking her eye and moving slightly.