Darrin forbids Samantha to attend her cousin Mario's wedding in Egypt. Endora, who is livid, states that Darrin is in "big trouble". Darrin gets a new assistant named Gideon Whitsett. Darrin is convinced Gideon is a warlock enlisted by Endora as a series of events makes Darrin look bumbling and stupid in front of a new client, and in turn makes Gideon look fantastic. Samantha uses a little magic to find out that Gideon is actually a conniving young man.

Samantha and Darrin spend the night at a hotel and Samantha briefly changes her hair to brunette. Larry spots them and thinks Darrin is having an affair. Larry proceeds to tell Louise. Louise meets with Darrin at a hotel hoping to convince him to drop the other woman. Larry spots them and thinks Darrin's other woman is Louise.

Samantha and Endora enjoy lunch at a great pizzaria owned by Mario. It seems that he is not selling pizzas and his business is going down the tubes. Samantha and Endora try to help out Mario, but ends up getting Darrin's job in danger.

When Darrin begins searching for a beautiful model to play "Miss Jasmine", Endora sees it as an opportunity to break up her daughter's marriage and sends a gorgeous witch to seduce him. Samantha recognises model Janine Fleur as Sarah Baker the witch. Sarah is determined to fulfil what she set out to do, namely seduce Darrin despite Endora calling off the contract. Samantha, who still has faith in her husband, just wants her battle with Sarah to be on an even playing field.

Aunt Clara comes to visit when Samantha meets Darrin's parents or the first time, his mother, Phyllis feels pushed aside, but his father Frank likes Samantha, thinking she's a lovely girl. When her daughter-in-law serves a magnificent dinner, Samantha confesses that it was actually Aunt Clara who helped her with the food, and that she is still learning how to be a magnificent cook.

Samantha hires Zeno the Great to perform at a charity bazaar and becomes his assistant to help the magician gain self-confidence. When Roxie, Zeno's former assistant, returns to capitalise on his newly found fame, Samantha tries to stop the scene-stealing.

When an ankle injury confines Darrin to bed, Samantha enchants the house so it can fulfil Darrin's needs. Darrin becomes intoxicated with the idea of magic, and starts encouraging Samantha to use her powers, but the change is not all for the better. Darrin quits his job and wants to travel the world. But soon he comes to realise he likes his old life better.

Promising to behave when she meets Darrin's parents, Endora turns on the charm and is promptly accused by Darrin's mother Phyllis of trying to steal her husband Frank's affections. Frank takes Endora to a play when Phyllis refuses to go. Phyllis wants a divorce when Frank doesn't come home that night, but he actually locked himself out and stayed at the club. Endora and Samantha use a little witchcraft to get them together.

Knowing that Darrin needs a new model for a campaign, Samantha turns a stray Siamese cat into an attractive woman named Ling Ling. Ling-Ling, who knows she's a cat brings those cat sensibilities to her human life, Wally starts to fall in love with her. Ling-Ling likes the attention she is receiving from Wally and wants to stay human. Samantha has to figure out how to tell Darrin the truth about Ling-Ling while she and Darrin try to persuade Wally that Ling-Ling is not the right woman for him.

The mayor, ignoring his constituents' request to have a traffic light installed at a busy intersection, needs some of Samantha's witchcraft to convince him otherwise.

To assist her daughter in a dress fitting, Endora transforms herself into a double of Samantha. While at the fitting, Robert Frazer, a young writer, becomes smitten with her. Endora decides to cavort with him as Samantha. Meanwhile, Gladys Kravitz thinks Samantha is having a secret affair. There are further complications when it turns out that Bob is an old friend of Darrin's. Endora shows up as Samantha at a dinner that Darrin, Sam and Bob are having. Bob now believes Endora is Sam's twin.

After an argument while he is teaching her to drive, Darrin enrols Samantha in a driving school. The owner assigns his nervous brother-in-law Harold to teach her. Samantha gives Harold a little self confidence.

Samantha uses her powers to open her garage door as Gladys is watching from across the street. Darrin and Samantha buy an electric garage door to avoid further suspicions from Gladys, but unseen mortal technology causes additional problems and suspicions.

While Darrin spends time with neighbour Pleasure O'Reilly's sister, Dora "D.D." Danger O'Reilly, Endora arranges for handsome warlock George to woo Samantha to break up her marriage to Darrin. But when George arrives on the scene, he isn't sure if it's Samantha he wants or Danger.

Gladys and Abner have yet another fight, but this time, the frustrated busybody kicks her husband out of the house. Abner seeks shelter at the Stephens' home and quickly wears out his welcome. Sam decides to reunite the couple by having them simultaneously dream of the day Abner proposed.

Endora decides to experiment with different looks to Darrin's face while he is taking a nap. As Samantha forgets to change him back, a horrified Darrin sees the transformation they did to his face after he awakens. He becomes self-conscious about the way he looks. Samantha disguises herself as a sexy French sculptor to help repair her husband's tattered ego.

When Darrin's alcoholic and lecherous client Rex Barker makes a pass at Samantha, she decides to teach him a lesson by turning him into a dog. The dog runs away, but Samantha eventually gets him back. When Rex makes another pass at her, Darrin knocks him cold. Rex does wind up giving Darrin his account.

Samantha has lunch with a few of her nosy neighbours, using magic to assist with the meal. Endora refers to Darrin as "What's his name", and that night at their first meeting, Darrin tells Endora that they can get along without witchcraft. They have a heated exchange before Endora leaves.

With her husband working overtime, Samantha is bored and agrees to have lunch in Paris with Endora. She happens to run into Larry and Louise Tate while there, creating confusion and hard feelings between Samantha and Darrin. After some missed connections, Samantha and Darrin fly to Paris together.

Maurice, Samantha's father learns she's married, and wants to meet his new son-in-law, but disapproves of mixed marriages, and an argument prompts him to disintegrate Darrin. Endora is furious, and Samantha tells Maurice she loves Darrin and not to take him away from her.

Larry sees Louise and Samantha entering an obstetrician's office and assumes Darrin is about to become a father. It is actually Louise who is pregnant, but she is afraid to tell Larry. After Larry tells Darrin, he has a daydream about Samantha having "witch" children. When the four of them have dinner that night, the truth comes out.

The Kravitzes and Stephens participate in a program that allows orphaned children to stay with adults for the holidays. When the Stephens' young charge reveals that he does not believe in Santa Claus, Samantha takes him to the North Pole.

Accompanying a beautiful, sexy client to Chicago, Darrin begins to act strangely when he suspects that her cat is actually Samantha in disguise.

While Darrin, Samantha and Endora are browsing through an antiques store, Endora believes it's time Darrin suspected that Samantha may not be as young as her mortal equivalent would be. Darrin sees a 300-year-old painting, "Maid of Salem", which bears a striking resemblance to Samantha, causing him to question her age and their relationship. As Darrin contemplates his future with Samantha under these circumstances, Samantha has to figure out a way to save her marriage if the truth truly does comes to light.

Flirtatious neighbour Pleasure O'Riley moves in next door to the Stephens. Samantha doesn't really appreciate Pleasure's ignorantly blissful helpless girl demeanour, or Darrin's seeming fawning over her at her beck and call because of it. Her incredibly jealous boyfriend, 'Thunderbolt' Swenson, mistakenly suspects both Darrin and Abner Kravitz of impropriety.