The Merit Scholar program is held at the Tipton, and to London’s dismay, she falls for one of the scholars, Trevor. But soon she realizes that she has no clue what he’s talking about, so she asks for the aid of Maddie. Meanwhile, Cody is fed up of Zack’s lack of cleanliness and decides it’s time for him to move out, but not where anyone expects.

Both Zack and Cody fall for a French Ambassador’s daughter who can barely speak English. Cody gets the date with her because of translations, but Zack gets the kiss. Also a guy tries to steal London’s purse, and when Esteban tries to help, he gets beaten up. Everybody starts making fun of him, so Maddie and London come up with an idea to help him gain his confidence back.

Maddie runs a day-care center at the Tipton, but needs Zack and Cody to fill in and watch her pint-size charges while she deals with a personal matter. Meanwhile, London encourages Moseby to take up yoga as a way of reducing stress, Carey joins aswell; in the end London has to take the class.

A food critic is at the hotel- every one is confident but Mr. Moseby wants Zack and Cody to be on the look out for the food critic so employs them as spies, although Carey is not so pleased at the start she soon changes her mind. Moseby is given a few pictures of the critic’s favourite diguises so he shows his spies. Then the boys have to find out who it is; just before the meal they spot a cowboy (one of the critic’s favourite disguises) so they tell Moseby, unfortunately chef Paulo and all the other cooks quit so it is up to Cody to lead the others into cooking for the critic.

One of the hotel’s horses is due to leave the Tipton, but the boys love the horse and try to save it going to the greulling job hauling lumber, it turns out to be very difficult hiding such a big animal. Meanwhile Mr. Moseby is booking in an important party hosted by a very rich lady who lives next to the Tiptons. Also London borrows Maddie’s brooch that is a family airloom, but she accidentally looses it, so she and Atwin go and search for it.

London begins going to school- at the same one as Maddy, but will she stay when she learns about the dress code, and her very own stalker. Cody and Zack, and their friends accidentally break a wall, but when they look through the holes, the see the girl locker-room.

When Cody gets fed up with the lousy food served in the school cafeteria, he decides to do something about it by running for school president. Zack thinks it is just a stupid idea and is not bothered, until he finds out that the first meeting is in Hawaii, then he decides to run also, there could only be problems. Meanwhile, Arwin tries to make the hotel more advanced with his inventions due to seeing Irv Wheldon on the front of the magazine, it claims he is the most efficient man in all of Boston, of course Arwin wants to prove them wrong.

Moseby’s millionaire older brother shows up with bad news, he has recently become broke, so he is given a job at the Tipton. Meanwhile Zack and Cody are trying to share a bike, but Zack keeps on hogging it, and cleverly using Cody’s time against him. Also Maddie and Estabon take advantage on London depending on her horoscope.

Cody’s high expectations of succeeding in wood shop class lead to disappointment when Zack receives a better grade; London takes credit for a short story written by Maddie, she later goes to a book reading were she reads out her book, but something happens that makes her tell the truth.

It’s Maddie’s Sweet 16 and she is having a party---on the same day that London has decided to throw her own big bash, there is only trouble when this happens, for Maddie’s sweet 16 is not how she expected it to be. Meanwhile, Zack carefully considers what gift to get Maddie for her special day, to try and safe it from utter disaster, but will he succeed?

During a twin convention being held at the hotel, Zack and Cody go out with English twin sisters. Meanwhile London meets a twin and takes a fancy to him, but Maddie meets him soon after and also takes a fancy to him aswell, in the end Maddie and London find out they are twins and so go on date with them, although one of them is not so pleased.

Cody's opponent in an important spelling bee is someone to whom Zack owes money, and Zack is told that his debt will be forgiven as long as Cody loses the contest. Will Zack make him purposely lose the contest?

Ilsa Schiklegoobermeyger challenges Moseby and the Tipton staff to a bowling competition after beating them by a lot in another sport; this time Moseby’s team looks set to win until star player Zack gets grounded and his replacement london can’t bowl; so Arwin has to deal with emotional scars from a past bowling incident and join the team.

Zack becomes overly impressed with a rich guest at the Tipton, or should that be obsessed, he is always borrowing from him, or is around at his house, or is going to places with him, he lives the high life while he is around, but will it last? Meanwhile Maddie and London experience some of the demands of parenthood when they are forced to care for lifelike baby dolls as part of a school assignment.

Zack and Cody are bored so they go to see Arwin, he is working on his Paralel Univerilezer, then he has an important call so he has to leave, but he orders Zack and Cody not to step into the P-U, but Zack and Cody step into it and a storm starts, they are transported to an alternate reality where everything is the opposite of what it really is. Will they stay, or will they come back?

Arwin competes against his old nemesis, Irv Wheldon, in the annual competition for hotel engineers, in which the grand prize is the golden plunger and a kiss from the plunger girl, who this year happens to be Carey. But things don’t turn out to be so easy for Arwin when his competition starts to use cheating to get ahead; Zack and Cody are on hand to try and help, but will they succeed? Meanwhile, London hires Maddie to work at her new boutique.

A park might soon be demolished, but Cody does not want this to happen because he loves the park, so he writes a speech he performs it to Zack, but he falls asleep, but he goes to city hall to read his speech there. Meanwhile Zack has a dream that they've gone back in time to historical moment in Boston, the time of becoming Americans, then Zack realises that the park has historical value so they start a battle against the park being demolished. Meanwhile Esteban is taking the test to become an American citizen, with the help of Maddie, Mr. Moseby and London.

When a father-daughter con artist team comes to stay at the Tipton to scam them out of some money by pretending to trip over Zack's skateboard, Zack knows he did not leave it to be tripped over, then he discovers that they are con artists so he gets Cody and Maddie's help in proving to Mr. Moseby that they are actually criminals. After a few failed attempts Carey tries to help as well.

Cody becomes editor of the school newspaper, and employs Zack to run the advice column, after all the other spaces are filled. Zack discovers how manipulating people can be a bad thing after he uses his new position to get a date with a girl, first he thought it good then she discovered the truth, so she breaks up with him.

Zack and Cody meet Raven Baxter who tells Cody that he will be in trouble after hearing a bell and a sneeze, which concerns him. Maddie asks London to wear one of Raven's designs, but London wouldn't wear anything that isn't a big name design. So, Maddie pulls a stunt which tricks London into wearing Raven's dress. They are also trying to get together a secret party for Carey. Then Hannah Montana arrives at the Tipton, and likes Raven's dress.

Cody is tempted to skip school and go to the mall with Zack and Bob. He decides to do it, and finds that one of his favorite bands is performing there, and they are going to pick a winner to dance with them, Cody and Zack put their names down (sort of). While they are there their mom comes to the mall as well. Meanwhile London is trying to get a grip on the fact her new mommy wants to be nice to her, but she ends up grounding her, so to do some bonding they take Maddie with them to the mall aswell.

Cody is determined to keep a kissing scene in the school play from taking place because it involves his new girlfriend and Zack; London takes it upon herself to redecorate the Tipton using the principles of feng shui.

A Japenese singer comes to the Tipton to sing at a convention, but she gets lost at the boys school, so Zack, Cody, and Carey must act as Japanese singers at the convention. Maddie and London, meanwhile, are trapped in London's closet.

Carey has new boyfriend, and this time it seems more serious, Zack is pleased for his mom, but Cody is not, so he calls his father tto come and help. Kurt arrives but does not see the emergency, so Cody has to try and deal with it himself. Mr. Moseby can’t wait for Harvey to marry Carey, because then the twins will be out of the hotel.

Esteban coaches a ballroom-dance team made up of Tipton regulars in hopes of winning a $1000 prize for his sisters kinsineara that is a very big deal in his country, but the team does not look to good, especially when one of the better dancers ,Carey, gets a cold.

Zack pressures Cody, Jessica and Janice into seeing a scary movie, and afterward finds himself dealing with nightmares. Meanwhile, London decides to masquerade as a a commonera to impress a cute boy who doesn’t like rich people.

Zack and Cody are in the Wilderness Scouts, so they go to camp with Mr. Moseby as their leader. Zack does really well in the camp and Cody begins to get jealous.

The boys discover that a hawk has taken up residence at the Tipton, but then it is scared off, leaving behind an egg; it’s up to Cody to look after and hatch the egg, with Mr. Moseby against the idea of it staying at the Tipton.

Zack has to take on the responsibility of taking care of Carey and Cody due to them being ill. Cody uses his illness to his advantage by making Zack his servant. Meanwhile, Mr. Moseby makes an announcement about the Employee of the Month and it's employees compete for that title.

Zack and Cody convince Mr. Moseby to open a club for kids in the hotel’s lounge in which they would manage. London has her own line of cosmetics in which she needs help coming up with a name for it.

The twins compete on a game show in which Cody does the mental challenges, while Zack has to do the physical challenges. Maddie mistakenly sends Mr. Moseby an angry e-mail which she tries to retrieve with the help of Esteban (who she mentioned in the letter), and with London’s help as well.

Moseby's grandmother visits and helps Zack with a school history assignment, but he only gets a D, so grandma Moseby has to come to the school to sort things out; London's dad insists she get a job, so she goes to the Cluck Bucket, where Maddie works.

Zack and Cody go on a double date at a miniature golf course and London starts a book club with her rich friends.

It’s Health & Fitness week in the hotel, and everybody there tries to eat healthier. Meanwhile, things go bad for Maddie and London in a fashion show.

A wheelchair basketball team is visiting the Tipton Hotel, in which Zack and Cody's basketball team plays an exhibition game against them, they try to get their friend who is wheelchair bound to join in, but he will not.

When Zack and Cody get discovered by talent scouts the Tipton staff goes to Hollywood to go watch a pilot of Zack and Cody's lives being filmed, most peoplehate the people playing them, and the people playing Zack and Cody are fired, so it is up to the real Zack and cody to step in.

When Zack and Cody get discovered by talent scouts the Tipton staff goes to Hollywood to go watch a pilot of Zack and Cody's lives being filmed, most peoplehate the people playing them, and the people playing Zack and Cody are fired, so it is up to the real Zack and cody to step in.

An adventurer presents an exhibit at the hotel featuring a mummy that is allegedly cursed, but before the exhibition opens, the boys knock the mummy out of a window and work fast to replace it. Esteban is against the whole exhibit, he says it is cursed; Maddie also believes This wrong must be righted.

After both taking career aptitude tests, Zack is pleased with the results he gets while Cody isn't so pleased when Zack's reveals that he will be a CEO of a major corporation, but Cody's says that he will only be a garbage man. Meanwhile, Maddie's sudden fame after saving a choking ambassador's life makes London jealous.