A leprechaun from Darrin's family (surprise, surprise!) named Brian O'Brian comes to reclaim his rightful pot of gold from one of Darrin's clients Mr. John Dennis Robinson.Brian states that without his gold, he has no powers and gets into a lot of trouble trying to get his gold back. By the end of the episode, he makes a deal with Mr. Robinson: his pot of gold back for his image on the advertising campaign and a deal with McMann and Tate.

When Samantha gives away Darrin's favorite jacket to Goodwill, it ends up tearing the marriage apart. The Stephens get counseling from the Tates and Endora conjures the famous Sigmund Freud to help them all out.

When Darrin makes Samantha return a coat, Endora puts a spell on him to turn him into a penny-pinching Scrooge. Darrin sees the error of his ways after a bombed-out dinner party with a cheap client, Mr. Bigelow.

Tabitha wants to go to the park, but Samantha tells her that she has a lot of chores to do around the house. So, Tabitha blinks up an ice cream cone, and Samantha reprimands her for using her powers and sends her to her room. Tabitha decides to create her own ""Samantha"" and goes off to the park. Gladys sees them there and asks about Adam and gets no response. Gladys calls Darrin, who calls Samantha who doesn't know what the hell is going on. Later, Tabitha gets a stomach ache from eating too much and confesses to her real mother. Seeing that Tabitha has learned her lesson, Samantha blinks away the fake ""mother"".

A classic Paul Revere teapot is taken by Esmerelda, who pops in Salem to bring Samantha's souvenirs home. Sam wants Esmerelda to return the Paul Revere teapot, but she returns Paul Revere instead! Revere thinks that it is 1776 and when he overhears one of Darrin's new clients say that he will ""take over the American market"" with his product, he rides his horse and does his famous call. After a series of misunderstandings, the teapot is returned and the image of Paul Revere riding his horse is used as a successful campaign.

Darrin's friends, Keith and Dorothy Wilson who happen to be black, invite their daughter Lisa to stay with Tabitha on Christmas Eve while they go away. Lisa and Tabitha want to be sisters because they get along so well with each other, but are discouraged when someone tells them that they can't be because Lisa is black and Tabitha is white. Of course, this gets out of hand when Darrin's newest client, Mr. Brockaway, visits his home. Lisa is asked to answer the door, and Brockaway gets a shock when he sees her, thinking that she is the Stephens' child! He turns Darrin down because of his bigotry. Tabitha lets Lisa in on her witchcraft and uses wishcraft to blink polka dots on both her and Lisa. Samantha then tells them that they don't have to look the same to be sisters because they are sisters at heart. Then, after a well-deserved lesson from Samantha, Mr. Brockaway admits that he is a racist and wants Darrin to handle his account as his apology.

Endora tries to make Samantha jealous again by recruiting a beautiful, sexy witch named Ophelia on Darrin. Ophelia tries anything to get Darrin to come to a sales convention, even fake stage fright. Darrin intentions are to spend time with Samantha, but Larry Tate intervenes. Darrin goes but decides to take a late plane back, but the unrelenting Ophelia disguises herself as an airport manager, informing Darrin the airport is closed due to fog. Endora suggests to Samantha that fog is not the reason Darrin is not coming home. Sam realizes that there is something fishy going on pops in to see what is up. With a little magic, Darrin realizes that Sam is his real love and Endora's in the hot seat.

In the final episode, Endora tries to test out Darrin's honesty by giving him a pin with a spell that makes him tell the truth. Darrin learns that honesty is not exactly the best policy when he jeopardizes an important account. It seems as though he may have lost the account, but the client likes the honesty between Darrin and Larry and gives them a break. As the series ends, Samantha and Darrin tell each other how much they love each other, without the magic of the truth pin.