How Not to Lose Your Head to King Henry VIII (1) - S8-E1
Continuity mistake: When Endora drops out of the painting with the trapped warlock the color tint shifts.
Revealing mistake: Darrin casts a shadow revealing painted sky background when he goes out to pay cab. Later, when he goes out to get in helicopter the neighborhood is not the neighborhood we normally see outside the Stevens' house. There's an Amoco gas station across the street.
George Washington Zapped Here (2) - S8-E22
Revealing mistake: When Samantha is showing Martha the washing machine, look at Martha's shadow; it's visible on the "trees" outside the window in the door, making it obvious it is a painted backdrop. (00:05:35)
Adam, Warlock or Washout? - S8-E14
Character mistake: In Season 3, Witches and Warlocks are My Favorite Things, Maurice says he won't stay for Tabitha's testing coven because it's "women's work" but in this episode, when Adam is finally tested, he arrives and says he wouldn't miss seeing his grandchild being tested.
Samantha is Earthbound - S8-E16
Revealing mistake: When Samantha, Darrin and Dr. Bombay are in the living room and walk as a group towards the television, you can see the crease in the carpet where the floor is going to collapse.
Samantha is Earthbound - S8-E16
Revealing mistake: When Samantha is in the tree at the party, you can see the reflection of the branch against the "sky" revealing blue painted sky.
A Plague on Maurice and Samantha - S8-E9
Continuity mistake: Samantha's illness is contagious and passed to Maurice from a kiss; when Samantha kisses the apothecary, he should have lost his powers also.
Samantha is Earthbound - S8-E16
Other mistake: This episode is a repeat of Season 4 No Zip in My Zap with the better Darrin 1. Since Samantha previously became earthbound for not practicing her normal, day to day, witchcraft. They would know why Sam is again earthbound. And, Samantha constantly uses her witchcraft.
Hansel and Gretel in Samanthaland - S8-E10
Continuity mistake: In 1-7 The Witches Are Out, Bertha (later Hagatha) is talking to Mary, and they say that Hansel and Gretel are 2 naughty children who go around eating the nice witch's house. In this episode, the witch is a "traditional" bad witch.
School Days, School Daze - S8-E23
Continuity mistake: After the teacher writes the equation on the board for Tabitha to solve, it keeps changing in appearance; the small loop at the bottom of the 3 comes and goes depending on the shot. (00:06:45)
Samantha's Witchcraft Blows a Fuse - S8-E25
Revealing mistake: When Darrin brings the ladder around to the front of the house, it's obvious this is not the actual house but a stage set; the background is obviously a painting and the driveway/garage have disappeared. Further the outside and windows are too narrow to be the actual house. The den is larger than the small facade in the scene.
Samantha's Witchcraft Blows a Fuse - S8-E25
Revealing mistake: When the officers pull away, the shadow of the car is visible on the painted backdrop of trees. This isn't the neighborhood of Morning Glory Circle with the Kravitz House across the street. The shadow reveals it's a stage backdrop. Further, this is basically the same as Allergic to the Macedonian DoDo Bird from Season 3, with the same DoDo Bird costume.
George Washington Zapped Here (2) - S8-E22
Continuity mistake: The front door which is usually green is now white.
Samantha's Witchcraft Blows a Fuse - S8-E25
Other mistake: When the police pull up outside the Stephens' home, it is a set shot with fake background. The "road" doesn't match the outside of Stephens' neighborhood shown throughout the series with the Kravitz house across the street (and not a pine tree forest as shown here).
Samantha's Witchcraft Blows a Fuse - S8-E25
Continuity mistake: The hole (square cut out) is visible in the carpet before they fall through. Also, when Dr. Bombay "cures" Samantha and she floats, the hole in the floor beside the couch is gone. Dr. Bombay fixed the floor in the next shot (when asked). The floor without the hole is visible when Dam floats up and when Darrin and Bombay walk over to her.
George Washington Zapped Here (2) - S8-E22
Other mistake: This episode is merely a redo of the Ben Franklin episode in Season 3. The plot is the same. The dialogue in many parts is EXACTLY the same. The courtroom dialogue is the same as the courtroom episode of Ben Franklin. In both episodes, Samantha acts as the attorney even though a lay person is prohibited by law of practicing law... pretending to be an attorney.
George Washington Zapped Here (1) - S8-E21
Continuity mistake: The door/hallway leading to kitchen which has always been visible outside and opposite the den has disappeared. It is now a hideously wallpapered wall with a picture.