When recently divorced doctor Sam and his teenage son Nick move in next door to Grey House, Cassie and Grace hasten to make them feel welcome.
While Cassie and Sam are still having trouble seeing eye to eye, Grace gets caught up in Nick's shenanigans and is accused of stealing.
Cassie tries to help a frightened young woman who seeks refuge at Grey House. The residents of Middleton gear up for the Heritage Festival 10K race.
The search is on for Cassie's mysteriously departed guest. Nick confides in Grace. Ryan's ex attends the Heritage Ball, leading to a confrontation.
When Cassie's troublemaking cousin Abigail appears, Cassie must stay on her toes as Abigail catches Sam's eye and brings out Grace's rebellious side.
Cassie is on edge concerning Abigail's activities in Middleton, fearing her cousin is stirring up trouble. Grace and Nick begin to find middle ground.
As an epic blizzard is poised to hit Middleton, Cassie worries about an expectant couple staying at Grey House, sensing trouble with the pregnancy.
While a storm pummels the town, Cassie and Sam tend to Eve's husband, Brian, who's suddenly ill. Grace, Nick and Anthony are stuck in the library.
While Cassie struggles with the notion of possibly losing her shop, Sam deals with an unexpected visit from his ex-wife, Linda.
Struggling to keep her shop, Cassie gets unexpected support. As Cassie helps Sam deal with Linda, she realizes her feelings for Sam have changed.
As all of Middleton gears up for its annual Halloween festival, a mysterious guest who checks into Grey House threatens to ruin the frivolity.
While Cassie deals with the furtive new guest in Grey House, Grace asks for help dealing with school bullies who are accusing her of being a witch.
Just as Cassie ponders more than friendship with Sam, Linda tries to reconcile with him. Meanwhile, Grace anxiously prepares for her driving test.
An old college friend of Cassie's threatens to derail her relationship with Sam, and Linda interferes when Grace asks Sam to teach her to drive.
Linda and Sam lock horns over Nick, and Ryan unexpectedly returns to town, prompting Cassie to wonder if any romance is right for her.
Sam helps Grace move through her grief over her father, Linda moves in and drives Nick to distraction, and Cassie learns the truth about John.
Cassie faces conflicting feelings over Sam and John, Grace's internship goes a little too well, and Nick picks a surprising extracurricular activity.
Grace helps a co-worker get her confidence back, Sam ponders letting Nick study abroad, and Cassie vacillates between Sam's and John's affections.
Cassie plans a surprise party for Martha, but the townsfolk make keeping the secret a challenge. Meanwhile, Sam weighs a job offer from the hospital.
Cassie lands in a pickle when a rumor reaches John that she is planning a romantic dinner for him. Meanwhile, she helps Sam with a big decision.
As the Lights Festival gets underway, Sam and Cassie share a moment of connection at the lake house that takes them both by surprise.
The Lights Festival needs Cassie's help to stay illuminated, and Grace witnesses a surprise that puts her in an awkward position.
When a popular novelist comes to stay at the Grey House, Cassie may end up being more help than the romance writer ever imagined.
Middleton’s new guest makes a professional decision. Cassie comes to a realization about Sam while bringing the town together for a special event.
As everyone awaits its blooming, the Middleton Merriwick has a curious effect on the women in town. Grace senses some interest from Nick.
A friend from Abigail's past arrives at the Grey House. Ben follows a sudden urge to get the old Middleton Theater back in operation.
Cassie decides magic is the best solution when two guests at the Grey House get off on the wrong foot. Sam has trouble planning a perfect date.
Cassie recommends an old romance film to Ben for the Middleton Theater's opening night. Martha runs into some trouble with the town budget.
When an anxious chef comes to town, Cassie suggests a recipe designed to put her at ease. Grace receives a special gift for her birthday.
A jealous Abigail thinks selling Venezuelan chocolates might be the key to competing with Cassie's popularity. Nick has a falling out with Noah.
A new paintbrush goes a long way for a reticent traveling artist in Middleton. Cassie involves Sam in her annual planning of a health event.
Cassie plans a surprise to celebrate the anniversary of Sam's arrival. Grace's magically arranged meetings with Noah don't go quite as expected.
Cassie finds a curious young girl playing in the Grey House gardens. Sam's visiting sister acts a bit odd. Martha makes an exciting announcement.
As their parents get swept in planning for the big day, Michael and Vanessa just about reach their limit. Cassie gets some unexpected news about Sam.
At Cassie's urging, some ancient, spooky relics are unearthed at city hall, while Middleton prepares for its annual Halloween celebrations.
The predictions of the ancient Perriwood Curse seem to be coming to fruition in a very mysterious and eventful Halloween for Middleton.
Sam hunts for the perfect ring to give Cassie for their engagement, although she's technically already accepted his marriage proposal.
Previously lost sheet music composed by famed 1930s Middleton songwriter Jacob Heyward is discovered in an old piano bench at Grey House.
Hoping to make amends, Abigail's father appears in Middleton. Cassie counsels an expectant couple. Grace questions her love of math.
Cassie and Sam encounter a few obstacles when they take Grace and Nick to a lake house for a weekend getaway with their soon-to-be family.
Inspired by a trunk full of vintage clothes that belonged to Cassie's ancestor Elizabeth Merriwick, Grace discovers a love of storytelling.
Grace schemes to get Nick and her friend Katie together in time for a dance, while a dating website developer checks in at Grey House.
Sam travels to Colombia to assist during a disaster, causing Cassie to consider their mortality. Grace uncovers more of Middleton's history.
After Grace discovers a letter describing Elizabeth Merriwick's wedding dress, Cassie sets out to find her ancestor's beautiful antique gown.
Cassie and Sam attend eye-opening bachelor and bachelorette parties. Grace gathers the women of Middleton to make a special quilt.
Abigail's romance fizzles but she gets a new job as mayor, while everyone prepares for the wedding of Cassie and Sam, only six days away.
On the eve of Middleton's bicentennial Halloween festival, a ruby of historical importance gets stolen. Abigail has a rough start as the new mayor.
Romance takes a turn for the worse after the Heart of Middleton ruby is stolen -- but Cassie has a prime suspect in a visitor to Grey House.
Sam tries to find the legendary tree where Cassie's ancestors were married while Abigail considers handing mayoral duties back to Martha.
Middleton celebrates as Cassie and Sam's wedding day arrives while Sam and Grace continue seeking the Forever Tree. Abigail makes a surprising ally.
During their honeymoon, Cassie and Sam help save a vineyard. Martha auditions for a TV role. Nick goes ghost hunting at Grey House with a friend.
Royalty comes to Grey House. Sam is visited by an ailing friend. Grace starts an internship at City Hall. Stephanie weighs her romantic options.
College acceptance time proves challenging for Grace and Nick. Sam tries to teach a resident better bedside manners. Abigail dates a former nemesis.
Cassie and Grace visit a college where the former is receiving an honor and the latter counsels her homesick host. Martha starts broadcasting gossip.
The Tinsdales vacation at Grey House. Abigail meets Donovan's mother, who thinks the couple is cursed. The ex-fiancé of Stephanie's boyfriend visits.
Martha finds the town's long-lost charter -- with a treasure map. Grace discovers Luke's secret agenda. Adam helps Stephanie with her food truck launch.
Middleton's residents wish on a comet. Sam is offered his dream job. Grace prepares her valedictorian speech. Donovan tries to win Abigail back.
Sam and Martha continue hunting for treasure and make an unexpected find. Grace discovers a passion for fashion. Nick prepares to depart for college.
Cassie's college roommate makes an unexpected visit. Sam's plans for a romantic Halloween are repeatedly thwarted.
The town rallies to break Blairsville's pumpkin-carving record. Autumn still harbors resentment from the past.
Sam frets about finding the perfect anniversary present for Cassie. A guest at Grey House seems highly interested in the Merriwicks.
While helping Joy plant a tree in memory of her mother, Cassie uncovers a time capsule buried by Grace many years ago. Sam competes in a chili cook-off.
At an estate sale, Joy hopes to buy an antique clock for Martha's renovation project. Stephanie's ex-husband Wes pays a surprise visit.
After receiving a mysterious letter, advice columnist Martha speculates about which couple will soon experience heartbreak during a progressive dinner.
Cassie pursues a temporary job as an art professor. Sam diagnoses Adam's condition. Abigail and Donovan uncover more clues that may help break the curse.
Sam performs surgery on Adam. Joy believes she had a dream foretelling a big breakup and tries to stop it from coming true.
To celebrate Grey House's 225th anniversary, Cassie displays Nathaniel Merriwick's paintings, inspiring Martha to direct a tableau vivant.
Cassie hosts a chocolate festival at Grey House, which gives Joy an opportunity to use the family recipe for a magical confection.
Cassie brings the women of her book club on an eventful road trip to Chicago. Sam's new boss Grant continues making his job difficult.
Ahead of Martha's housewarming gala in Middleton, a final clue leads to a fateful reunion – and the resolution to an ancient curse.
Things don't go as planned for Cassie and Sam's romantic date night and Abigail and Donovan's engagement party. Joy has a mysterious dream.
Cassie and Sam go on a double date with Grant and his girlfriend. Martha puts together a "Grease"-themed movie night in the park.
Martha plans a baby shower for her daughter-in-law, Claire. Abigail gets an offer to sell her shop. Stephanie starts taking French lessons.
Joy revives a defunct Middleton tradition as Sam's surgery on a famous basketball player is thrown into limbo.
Joy's recurring dreams inspire the cousins to go in search of a missing piece from her past. Martha experiences a strange series of events.
The cousins toss coins into Middleton's wishing well, producing surprising results. Sam reunites with a high school classmate who is now a rock star.
Cassie and Sam visit his ailing sister. Abigail faces unanticipated competition. Adam considers returning to his old job at the hospital.
Sam wants to return to work. Stephanie vies for admission to an academy in Paris. Joy grows concerned over Zoey's job as a firefighter.
When the cousins' powers act strangely, Sam recruits help to find a missing amulet at Grey House. A couple takes the next step in their relationship.
In the series finale, the Merriwicks mystery unravels as the lives of other Middleton residents take meaningful turns.