Sam and Darrin's phone number is 555-2134.
Normally a spell can just get nullified by the person who has made the spell so far. In this episode it became possible for Samantha to nullify another spell. The given explanation is, that Fergus, who needed that service, had asked and paid for the spell in the first place.
When Samantha and Tabitha are being pursued by Fergus Finglehoff on their way home from the park, a boom microphone can be seen bobbing in and out of the frame in the shadows behind Fergus when they are in front of the 1164 Morning Glory Circle garage.
The view through the kitchen window is of a street instead of the neighbor's house.
When Larry leaves, a big hole in the porch roof shows.
When Sam turns invisible and goes upstairs to pack, Darrin follows her. The closet doors open and a suitcase is pulled out of the right side of the closet. Above the suitcase there are clothes hanging on the right side only. When the closet is opened again later there are clothes on both sides of the closet.
When Samantha comes from the back yard to answer the phone, she is shown coming from the front of the house.
When Samantha wears the flying suit, the heart necklace disappears and reappears.
When Aunt Clara arrives covered in soot from the furnace's chimney, the kitchen broom closet has suddenly become the door to the basement staircase. It is far too narrow of a door to be anything other than a closet.
Darrin's office is in the International Building on the 32nd floor.
When Ho Ho arrives at 1164, the front door is the wrong one. It is usually dark green with a semicircle top window.
When Darrin comes home to find the vacuum cleaner running itself, he rushes across the room to it. His path takes him through the space where the TV belongs at the stair landing. The TV is still missing as Sam comes down the stairs and they argue.
When Sam and Darrin watch TV footage of the national derby, the TV screen is oval. In the close up, however, the TV screen is rectangular.
Since when were there mountains in New York City? Because of the Screen Gems studio's location in Southern California, outdoor city scenes on the show often revealed mountains in the background.
When Mrs. Kravitz realizes its Ben Franklin she has just met, instead of staying to talk with someone she is so excited about meeting, she just runs right home to tell her husband. Seems like if you met someone from the past so famous (Mrs. Kravitz always believed Samantha had supernatural powers) you might stay and actually "meet" the individual instead of running away.
The walking chair prop is also used in the episode "Long Live the Queen."
After Aunt Clara caused the power failure, Abner and Gladys Kravitz came to the Stevens house and rang the doorbell. It wouldn't have functioned if the power was out.
Abner and Gladys's address is shown to be 1168 Morning Glory Circle, but since they live across the street from Sam and Darrin, theirs should be an odd-numbered address.
The script consultant missed on this episode! Previously, Endora fled the country on Halloween to avoid the mortal celebrations, but this episode seems to contradict that theme.
During the party, some of the guests are shown at the party before they are shown arriving.