Michelle Hathaway and her two daughters, Taylor and Frankie, move to New Orleans and discover that their new house is already occupied by a ghost family comprised of dad, Ray Preston, and his sons Miles and Louie.
As the newest member of the gymnastics team, Taylor is worried to find out she is responsible for hosting a team sleepover but Miles promises he and Louie will be on their best behavior. Unfortunately, Frankie and Louie team up to scare Taylor and her friends out of the house.
Taylor assures her gymnastics team she can win the top cash prize at the science fair so they can buy new uniforms, assuming Miles will help with his ghost powers. However, Michelle forbids Taylor from using Miles' short cuts, leaving Taylor to create the project herself. Michelle gets into bigger trouble when she tries to improve Taylor’s project and breaks it, and must rely on Louie’s erratic ghost powers to fix the problem.
An argument between Ray and Michelle causes them to each think they're the better parent so they decide to switch roles. Lo and behold, Michelle is unable to wrangle the boys and Ray is completely thrown by the intricacies of girl social antics.
Frankie is not exactly the best player on her school volleyball team, so Ray decides to give her a “boost” using his ghost powers. It’s a huge success, but at the next game when Frankie is left to rely on Louie’s erratic abilities, she needs to find the confidence from inside herself and step up on her own.
Taylor is asked to a society ball by a seemingly sweet kid but when he turns out to not be the best partner, Ray comes to her rescue.
The Hathaway/Preston Yard Sale is the first official “family” activity and everyone is on board until Louie fumbles his attempt at possessing one of the stuffed animals, landing himself in Taylor’s favorite nurse doll. When the doll, with Louie inside, gets sold to a doll collector the kids must all work together to get him back home safely.
It’s Taylor’s birthday and Miles is excited about getting his “new” sister a special gift – a ghost dog. When the dog turns out to be a less than the perfect pet, Miles tries to cover it up but gets caught.
Frankie fakes an injury to avoid a play that Michelle is directing at her school.
Louie gets mad when Frankie writes an essay for a prestigious private school that says he is a horrible ghost and he tries to sabotage the interview for the school. Meanwhile Taylor wants Miles to start to respect boundaries.
Ray and Miles agree to help Taylor with her first Halloween party in the house.
Taylor and Frankie ruin Michelle's date.
Michelle's cookie jar is broken.
Ray and Louie accidentally switch bodies right before their annual camping trip.
Frankie tests her friendship with Louie when she ditches him to seek Miles' help on a school project.
The children must work together to retrieve Michelle's secret recipe book after it is stolen by a rival bakery.
The Great Frankini accidentally hypnotizes Miles to become a bad ghost instead of her intended target, Louie. Frankie must find a way to break the spell before Miles destroys Taylor's school talent show performance.
Louie and Frankie step over the line with one of their pranks. The only choice for Michelle and Ray is to break them up for a while. It isn’t long until they realize, however, that the two are better as a team.
Frankie can't wait for "Crazy Cakes Day" with big sister Taylor.Unfortunately, Taylor has other plans, so a slighted Frankie concocts a scheme, involving a popular teen heartthrob, that just might make taylor suddenly free.
Ray’s conservative father visits, and Ray struggles to tell him about his family’s unconventional living arrangement with the Hathaways.
Louie makes up a story about Ray's occupation on Parent Career Day. Meanwhile Clay Banister food critic of New Orleans comes to Pie Squared but has lost his job due to events in the pilot. In the end Louie admits to Ray that he lied to everyone about Ray's job ,and Clay Banister gets his job back.
Miles' friend worries his family will have to move because their business is haunted.
Louie hosts a meeting for a boys' ghost club; Frankie pretends to be a ghost boy to join Louie's club.
Louie prepares for a duel against his school’s top ghost after Ray builds up his confidence.
Taylor seeks Louie's help while writing a report on Vikings; Louie invites a ghost Viking who wreaks havoc and is difficult to contain.
Louie pranks Frankie on a whole new level. Leading both of the pair to get voodoo dolls that they pit against one another.
Taylor takes extreme measures to help a friend on her gymnastics team; Miles and Frankie use each other in a spelling bee.
Frankie gets help from Louie in taking revenge on her pranking nemesis.
Louie turns Frankie into a half ghost when something big comes up; Taylor, Michelle Miles and Ray compete against eachother. The gang enters the mysterious Ghost World where Frankie is stuck in ghost jail.
Louie takes Frankie to Ghost World on her birthday; Frankie is put into ghost jail.
Taylor plans a way for her crush to notice her. Frankie and Meadow seek revenge.
Miles acts selfishly, jeopardizing Taylor's new friendship with Meadow; Louie and Frankie move to the tree house to live by their own rules.
Frankie tries to sabotage Taylor's study date with Scott by driving Taylor mindly insane.
Louie accidentally breaks Miles' telescope.
Louie gets an opportunity to show off his rap skills at a school contest and invites Miles to sing with him.
After a supervillain escapes Ghost World on Halloween, the Thundermans head to New Orleans to join forces with the Hathaways and the Prestons to defeat the ghoul.
Taylor accidentally hits Meadow in the head while using Madame LaBeuf's staff. when Louie tries to scare off Meadow while earn his ghost scouting badges. Meanwhile, Frankie tries to help Miles cope with Mirabelle leaving for boarding school.
Frankie's new keyboard is destroyed in the middle of the night, leaving her to become a sleuth in determining who the culprit behind the act could be.
Taylor and Meadow let the inchworm get stolen, and they ask for Miles' help.
After being blamed for Louie's mess, Frankie is sent to charm school.
While in a fight with Scott, Taylor meets an intriguing new boy who happens to be a ghost; Miles help Taylor decide who she wants as a friend.
After getting to know Miles, Meadow develops a crush on him; Taylor goes to great lengths to protect a secret.
Frankie and Louie plan to sell a valuable doll to a collector, but they run into some unexpected trouble at the toy store.
Frankie is suspicious of one of Louie's classmates when she asks Louie to teach her how to be a better ghost.
Michelle gets the bakery included on a tour of haunted restaurants, and Louie has to pull off the haunt.
Taylor wants to give Meadow a surprise party, but it accidentally gets complicated when Miles throws a wrench into the plan.
After failing the test to become a level two ghost, Louie runs away from home and ends up in a dangerous part of Ghost World.
When the ghost council finds out the Prestons have been living alongside humans, the council forces them to make a decision between haunting the Hathaways and leaving home forever.
The Thundermans travel to New Orleans to help the Hathaways and the Prestons when a super villain escapes Ghost World on Halloween.
