Cody falls for a girl in a beauty contest, and ends up becoming part of the contest by dressing as a girl. The prize: Enough money for Zack and Cody to get new bikes!
Maddie pretends to be rich so one of London's friends (Jason and Kyle) so Jason will like her. Once this is pulled off, the lie gets bigger and bigger. Zack and Cody need to help Maddie!
Mr. Moseby's job gets taken by the hotel inspector, Ilsa. It is Zack's fault, and he feels guilty, and tries to set things right. Meanwhile, London's dog, Ivana wants a poker party and Maddie is in charge.
Flowers are delivered to suite 2330 and it is believed that they are from Serge the Concierge, but it turns out that Carey's secret admirer is Arwin, the crazy Tipton Hotel janitor and inventor.
Go-Dance USA is at the Tipton and Max and Zack enter the competition. When they get to the finals, Zack hurts himself. Cody, who thinks he is bad at everything, replaces him. Meanwhile, Maddie becomes London's servant.
Maddie is going to go to the prom with a guy, but Zack thinks Maddie has a crush on him, instead. Meanwhile, when a circus comes to the Tipton Hotel, Cody tries to live the mime life.
Zack, Cody, Max and Tapeworm have a new band: Rock Squared. They are competing with Lance and Maddie's band. Cody leaves the band for a while. London joins the other band but she is a bad singer.
Cody and Tapeworm go to Camp Knock-a-Number and Zack is happy that Cody is gone. Zack finally realizes that he really misses Cody and Carey can see this. London is going to get her driver's license, but Moseby is pedantic.
There is a thief in the Tipton Hotel and Esteban is a suspect. Zack and Cody know that it was not Esteban but when they find the right guys no one believes them. Maddie looks after Ivana.
London is falling in love with Todd St. Mark. problem is, his father is the owner of the St. Mark Hotel! This hotel is a rival to the Tipton Hotel. How will their relationship continue?
London starts a rumor about Maddie going out with Lance Fishman. Maddie then returns the favour, with bad results. Cody is tired of getting confused with Zack, so he changes his hair—to red.
Mr. Moseby takes Zack and Cody to a baseball game, and ends up catching the ball, making the Red Sox lose. Moseby then becomes the most hated man in Boston. Maddie goes on a date, but they both look weird.
Jesse McCartney stays at the Tipton. Zack tries to get his personal effects to sell online, while Maddie and London both think they're meant to be with Jesse forever. Cody tries to enter the local science fair with a laser cutting device.
Zack pretends to have dyslexia so he does not have to do hard work. Everyone feels sorry for him, especially Carey. What will happen when the truth comes out?
Kurt Martin (Zack and Cody's father) drops in for a visit, and the three cause a lot of trouble. Zack sneaks into Kurt's tour bus because it's more "fun", but unbeknownst to him, Carey is going crazy with fun back home.
It's Christmas at the Tipton, but everyone is snowed in. Zack, Cody, Carey and Kurt can't go anywhere. Maddie gets greedy when she riggs the "Secret Santa" competition.
Max kisses Zack after winning a basketball game. Zack is shocked. The two end up not talking to each-other. All this changes when they go on a date. London may be disinherited.
After listening to a life coach, Cody is inspired to help others "pilot their own lives". This turns ugly. Maddie and London compete to be "Teen Trends Trendy Teen of the Year".
Agnes has a crush on Cody, and Cody hates this. Later on, Agnes loves Zack, and the two hatch a plan to settle things. London's dog Ivana and Maddie's dog Scamp fall in love, and London sadly denies it.
Cody and Zack both like a girl, but she only speaks French. Esteban tries to stop a thief, but can't; instead, London steps in, making Esteban look like a fool.
A famous critic is coming to the Tipton—in disguise. When Chef Paolo walks out, Mr. Moseby enlists Cody, along with the help of Zack and the other staff, to help cook him a meal. But will the critic give a good review?
When Tippy is about to be sent off to a lumberjack's mill, Zack and Cody have to hide it until they can convince Mr. Tipton to keep it—if that's even possible.
When Zack and Cody accidentally punch a hole in the wall of one of the suites, they find a girls' changing room next door and can't resist. Meanwhile, London is attending Our Lady of Perpetual Sorrow with Maddie, and when she sneaks out of detention, things go awry.
Zack wants to be school president just for the popularity and power, while Cody wants to clean up the school. With Maddie helping Cody and London helping Zack, who will emerge victorious?
Mr. Moseby's miniature brother, Spencer checks into the Tipton with a shocking announcement: his millions are gone. Now he needs Mr. Moseby's help to get back on his feet. Zack and Cody face a similar situation when Zack is hogging a bike that Cody paid for.
When Cody's math class is cancelled, he joins woodshop with Zack, thinking it will be easy. But with the final coming up, he thinks he's doomed—until Zack sacrifices his grade for his brother. Meanwhile, London gets all the credit for Maddie's story idea.
When London hosts her party on Maddie's birthday, all bets are off. Zack, loyal to Maddie, attends her party after trying unsuccessfully to find the perfect gift—but what will she say when she finds out he stole Cody's?
The Tipton hosts a twins' convention. While Zack and Cody go out with beautiful English twins, Maddie and London end up on a date with fraternal twins—and Maddie is far from happy.
Zack owes money to Maynard, the finalist alongside Cody in the local spelling bee, and asks Cody to forfeit to pay his debt. Maddie is doing local charity work with her class, and London keeps showing them up without actually doing any work.
Zack is grounded, and can't participate in the bowling contest against the St. Mark Hotel, despite being their best player. Can he help Arwin overcome an old fear in order to redeem himself?
When Zack befriends a rich Theo, he ditches Cody completely, until he realizes that Theo may just be using him. All the while, Maddie and London are trying to take care of a baby simulator for school.
Arwin participates in the Hotel Engineers' Games, but when a competitor, Irv Wheldon is cheating, Zack and Cody step in. Meanwhile, London starts a fashion store and recruits Maddie for her business functions.
When a local park is going to be demolished, Cody writes an essay to the city, but to no avail. Zack discovers that the park may have historical significance, and races against time to get an injunction against the bulldozers. Esteban tries to get citizenship in the United States.
Zack takes a position in the school paper as the anonymous advice columnist, but begins to abuse his position to get Darlene to like him—until she finds out. London can't sleep, and keeps waking everyone up to help her.
Zack drags Cody to the mall when they miss the morning bus, but soon, their mother shows up and they have to avoid her before she finds them. London tries to get rid of her new step-mother, who shows a little too much interest in London.
Zack and Cody have parts in the school play, A Midsummer's Nightmare, but the girls they like each like the wrong person, which turns out to be the perfect emotional fuel for the Shakespearean classic. Luckily, they don't have to put up with London's obsessive feng shui fling back at the Tipton.
After Zack uses Kumiko Mori as his International Day project, he loses her when she goes shopping. Carey, Zack, and Cody must fill in for her performance at the Tipton, where a group of Japanese guests are expecting a fantastic cultural musical. London and Maddie get trapped in a clothes closet.
While Cody tries to stop his mom from getting married, Maddie discovers that she can make London a better volleyball player by getting her really angry.
Esteban needs money for his sister's upcoming birthday, which is the marking point for becoming a woman in his culture. He enlists Zack, Cody, and several others to compete in a ballroom dance competition. But when Carey gets sick, Jessica and Janice quit, and Zack and Cody are disqualified, do they still have a shot at the prize?
After Zack and Cody see a scary movie against their mother's permission, Zack begins to have nightmares of zombies attacking him. Meanwhile, London falls for a poor boy, and doesn't want him to think she's a rich snob, so she pretends to be destitute.
When Zack and Cody join Mr. Moseby's scout troop, Zack turns out to be an excellent fisher, and becomes the troop's hero. Cody finds a way to get food from an outdoorsman nearby, but is caught cheating. Their mother, back home, has to give London and Maddie dating advice for the same boy.
After a mother hawk is scared away from a suite's balcony, Cody takes care of its egg. Mr. Moseby tries to get rid of the bird, and Maddie protests against him.
When Carey and Cody take ill, Zack has to take care of them both. During her recovery, Carey ends up winning "Employee of the Month" after she is the only one not to annoy Mr. Moseby in hopes of winning.
Zack and Cody set up a kids' club in the Tipton's lounge every Monday night, but after Cody's plans fail, Zack takes charge and things go great—until his ideas go too far. London tries out a set of new cosmetics, and Maddie is happy to help—that is, until she realizes that they're flawed.
Zack and Cody end up on a game show, Risk It All, but when Cody pushes Zack too far, their chance of winning is up in the air. Back at the Tipton, Maddie tries to recover an angry email she sent by accident.
When Mr. Moseby's grandma comes to the Tipton, Zack asks her for homework help. But when he gets a D on the assignment, they confront his teacher. Maddie helps London get a job at the Cluck Bucket.
When Zack is beaten sorely by Ella at minigolf, he enlists Mr. Moseby to help him get better. But when he wins next round, he becomes arrogant and insulting to everyone else. London starts a book club, but without reading in mind.
Zack begins to overeat, and Carey makes him quit sugar entirely, and Cody helps Chef Paolo live healthier. Maddie tries to get bigger hips for an upcoming fashion show, and London tries to get in shape.
When Zack and Cody's former basketball teammate, Jamie, who is now in a wheelchair, visits the Tipton, they try to get him enthusiastic about playing again. Maddie tries to make a student film, but none of her actors are quite up to snuff.
Zack and Cody accidentally send an ancient mummy flying out a window. Cody dresses up as a fake mummy while Zack goes to get the real one to replace him. Maddie, however, wants to sneak the real mummy out, but ends up with Cody instead.
After taking an online aptitude test, Zack becomes obsessed with power and fame, and Cody becomes depressed. Maddie saves an ambassador's life, and steals the limelight away from London, who is less-than-impressed.
The kids at Camp Heaven-on-Earth spread dirty rumors about London to the press, while Zack is back home toiling away in the worst job he's ever worked.
Zack and Cody are preparing for a bag-off with a competing mini mart. But while Nia and London are goofing off all night long, they pull the twins along for a ride.
When Zack sees that Carey is ready to blindly sign her singing contract for Mr. Moseby, he insists on getting her a few extra benefits. Cody, on the other hand, is stuck in the middle of a battle between London and Nia, who both need his help in science.
Since none of the staff at the Tipton can get along, Mr. Moseby orders a motivational speaker to come in and help out. They get more than they bargained for when Zack and Cody let loose hundreds of bugs in the hotel.
The boys' father is in town for a while, working on a play that runs every Friday night. When he's out, the boys sneak into his place with their dates; will Kurt find out?
Cody produces Yay Me!, London's new webshow, but ends up being a dress-up doll instead. Meanwhile, Zack and Mr. Moseby help each other overcome video game addiction.
Cody becomes a severe mysophobe, but is saddened when he finds out how many germs there are if he wants to go skating with Tony Hawk. London and Maddie take private fencing lessons, and fight over the instructor.
After Maddie finds a lost phone, she is certain that its owner and her are meant to be together—until she finds out just who owns it. Meanwhile, Zack and Cody argue over who gets to "borrow" their new friend, Travis, to help them score dates.
Zack makes it onto the basketball team, but never gets to play. Cody, on the other hand, forms a cheerleading squad with several cheerleading rejects to face off with the school's "official" squad at Zack's game.
When Zack and Cody book their mother a holiday, she's ecstatic that she gets a break from work. They neglect to tell her that they can only afford it if she sings while on vacation.
When the head honcho returns to the Tipton, heck breaks loose and he becomes enraged. In order to keep someone from getting fired, Zack and Cody hatch a plan.
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