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. (00:16:40)
Revealing mistake: When Endora goes to Darrin's workplace and puts the spell on him she appears to be floating. Look closely and you can see the wires holding her up.
Revealing mistake: When Samantha and Bombay are at the top of Mt. Everest, Samantha's shadow can be seen on the "sky" behind the rock revealing a blue backdrop.
Marriage, Witches' Style - S5-E21
Revealing mistake: The wires holding the cake knife are visible as it's cutting a slice. (00:00:25)
Marriage, Witches' Style - S5-E21
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. (00:07:20)
Marriage, Witches' Style - S5-E21
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. (00:22:25)
Samantha's Yoo-Hoo Maid - S6-E2
Revealing mistake: Whenever Esmeralda sneezes and makes the furniture in the living room levitate you can see the wires.
Samantha's Caesar Salad - S6-E3
Continuity mistake: After Tabitha spills her milk, the size and positioning of the spill changes significantly between shots. (00:00:30)
Naming Samantha's New Baby - S6-E6
Factual error: When Mr. and Mrs. Stephens are driving in the convertible. In second shot, there are at least 2 tall palm trees along the road. Morning Glory Circle is supposed to be a NY town. There are no palm trees growing in NY. It's obviously shot along a CA road.
To Trick or Treat or Not to Trick or Treat - S6-E7
Revealing mistake: The wire used to control the flaming arrow's flight is visible in the closeup. (00:21:00)
Other mistake: Although Diane Murphy played "Annabelle", she is listed in the closing credits as having played "Diane". (00:25:00)
Santa Comes to Visit and Stays and Stays - S6-E14
Continuity mistake: Tabitha's scarf jumps from one side of Samantha's lap to the other in consecutive shots. (00:01:50)
Santa Comes to Visit and Stays and Stays - S6-E14
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. (00:09:30)
Tabitha's Very Own Samantha - S6-E19
Other mistake: The Ferris wheel starts turning before the operator pulls the handle to start it. (00:09:55)
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. (00:02:25)
Continuity mistake: When Larry comes to the Stephens' house, he looks at Dr. Bombay and asks "who's that?" In Season 3, There's Gold in Them Thar Pills he met Dr. Bombay and partnered with him to sell Dr. Bombay's pill to cure the common cold.
Other mistake: This is a remake of season 1 episode when Paul Lynda makes his first appearance as Harold the driving instructor for Samantha.
Suggested correction: This is trivia at best, but the episode isn't really a remake of an earlier episode. Here Samantha teaches Uncle Arthur (Lynde) to drive and in season 1 Harold (Lynde) taught Samantha to drive. But the same actor playing multiple roles in a series is never a mistake.
Serena Stops the Show - S6-E22
Revealing mistake: The face of the double can be seen when Samantha and Serena come from the kitchen. (01:10:00)
Visible crew/equipment: The shadow of one of the cameras - complete with protruding lens - is visible on Jack Cassidy's coat as he walks toward the living room. (00:15:20)
Revealing mistake: After Samantha restores The Leprechaun's power he walks into the backyard, and when Endora, who's on the roof, uses her powers to have him float up to join her, the wire cables can be seen giving him the needed boost upwards. Later, the cables can be seen again when Sam lifts him up in the living room. (00:09:40)
