Zack gets a job at the minimart, but has to deal with Cody bossing him around. Meanwhile, London doesn't know how to present Lance to her friends.

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.

London's father goes broke due to an investment in a diamond mine. London now has to move in with Maddie. Zack and Cody wonder if their parents ever got them mixed up when they were babies.

Maddie is having her Sweet 16, and likes to have her party at the Tipton. On that same day, London decides to throw her own bash. Zack ends up trying to figure out what to get Maddie for her special day.

Maddie is back and is not getting along with Nia, while Estaban is not getting along with Patrick, and the rest of staff aren't getting along either. So, Mr. Moseby hires a professional to help the team get along. Meanwhile, when Zack causes some customers to leave, he and Cody schedule a bug convention at the Tipton to make it up to Mr. Moseby. However, due to his fear of bugs, he accidentally releases the bugs into the Tipton.

It's the first day of high school for Zack and Cody. For the first time, London has to attend public school.

Maddie, Cody and Zack compete to get the best guest for London's online chat show. Luckily, The Cheetah Girls and Chris Brown are staying at the Tipton, but who will end up winning the competition?

The Tipton shoots a commercial. The director happens to be a date of Carey's from 15 years ago whom she left in the middle of the date. He prevents Carey from trying out for the commercial—but in the end, Carey and the twins end up being in the commercial.

When a rich, cute guy stays at the Tipton, Zack and Cody help Maddie impress him by making him think she's rich. In the end, the guy finds out Maddie isn't rich but he still likes her.

Maddie has her prom at the Tipton Hotel after realizing there is nowhere else to have it. Zack thinks that he will be her date, but ends up getting dissapointed. Cody starts to act like a mime.

After two struggling television writers take inspiration from the Tipton, the gang is flown out to L.A. to serve as consultants on the new show. After the "Zack" & "Cody" actors don't pan out, the twins end up cast as themselves.

Arwin could win a trophy and a kiss from Carey, if he ends up winning an annual competition for "Hotel Engineers"; in which the boys help Arwin train and compete. Maddie ends up getting hired by London to work at her new boutique.

Zack and Cody wish for superhero powers when they see a shooting star. Their wish comes true and they learn that Mr. Moseby is their villain, who wants to turn all kids into miniature adults.

When the twins find out about hidden treasure in the Tipton, everyone goes into a frenzy looking for the money.

Zack, Cody, and the entire gang get snowed in at the Tipton. Maddie rigs a "secret santa" bowl so that London will get her a gift.

Zack and Cody try to make friends at school. When word gets out that they live at the Tipton, all of the cool kids hang out with them. In the end, the twins find out who there real friends really are. Meanwhile, Carey is practicing dance moves, while London teaches Maddie how to ask Lance out and Maddie tutors London in Math.

Cody, is having difficulty dealing with the fact that Carey has a new boyfriend. But, Zack and Kurt do not have a problem with him because he is rich. London joins Maddie's volleyball team and ends up being rather good- but only when she is mad.

When Zack and Cody invite Arwin over for dinner he won't seem to leave. Carey is getting annoyed at him so she forces Zack and Cody to make him go. Meanwhile, Lance dumps London and she wants to find a way to get back with him.

Zack borrows money from a guest named Maynard to play video games, but starts to fear him when he can't pay it back. Cody enters a spelling bee. London and Maddie help a homeless family.

Zack and Cody have two pet rats as a science project. Mr. Moseby gives the twins tickets to a Red Sox's game to get them away from the hotel. Then a hotel inspector seizes control of the Tipton, because of Zack's mistake. London has a dog party for Ivana and Maddie has to plan.

Maddie runs a Daycare Service at the Tipton, and when Maddie has a family obligation to attend to, Zack and Cody take over. Meanwhile, London encourages Mr. Moseby to take yoga to help him relax a bit more.

A food critic is coming to the Tipton Hotel. Cody ends up having to fulfill the duties of being head chef, after the Tipton's regular chef suddenly quits, on a very important day.

There is a Battle of the Bands competition being held at the Tipton Hotel. Zack and Cody, along with Max and Tapeworm compete against Maddie's band in which has London in the band.

Zack and Cody befriend Travis, a kid whom they rope into helping them impress their dates. They then bail on Travis and go out with their dates, but lets Travis go with the girls instead. Maddie finds a stranger's phone whom she thinks is her crush (because she and the stranger have many of the same interests, which she found out on the lost phone). At the end, the owner of the phone was an old man, but Maddie takes an interest in the old man's grandson.

A monster-like robot is accidentally released into the hotel, due to the twins. A Halloween party is thrown by London. A typical prank.

Zack and Cody each invite a girl over to their dad's empty apartment. Meanwhile, London teaches Esteban how to act rich because his family has seized power in his native country.

Zack tries out for the high school basketball team but realizes there's some stiff competition, the kind he didn't face in middle school, and worse yet, the giant, in-your-face Coach Little (Michael Clarke Duncan). Meanwhile, when they're rejected as cheerleaders, Cody and London form their own cheerleading squad with the help of Mr. Moseby.

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.

Zack and Cody fall for a French girl who can't speak English very well. Meanwhile, somebody steals London's purse and Esteban tries to help.

Zack and Max compete in a dance contest. Cody learns how to do magic. Zack injures himself, and Cody has to take his place in the dance finals. Maddie becomes London's servant after London lends her money.

Zack and Cody join the Wilderness Scouts with their leader being Mr. Moseby. Cody becomes jealous when Zack turns out to be a better outdoorsman. Meanwhile, London claims that Maddie stole her former boyfriend and both plead Carey for advise on her "relaxing" day.

Zack makes a new rich friend, who is mean to Cody and thinks he is a dork. Maddie and London have to do a parenting project for school as partners.

Cody ends up going away to camp. Zack starts to miss him, and has to find a way to get to him. London ends up learning how to drive, with the aid of Mr. Moseby.

London develops a crush with the son of a rival hotel owner, of which Ilsa is the the manager. Zack and Cody bake cookies to be served at a ball held at the Tipton.

Cody runs for class president; Zack decides to run as well, but for the wrong reason. Mr. Moseby gets annoyed with one of the staff members.

The news of a visit from Mr. Tipton gets the employees excited (and reminiscing) about their good deeds as to who deserves a possible bonus… but when they find out Mr. Tipton is in a bad mood and will fire someone, all fingers point to Carey because of the boys' mishaps, but Zack & Cody come up with a plan.

A competing minimart issues a competition to see who can bag items faster, Zack and Cody accept the challenge. Meanwhile, Mr. Moseby's niece Nia is goofing off with London.

Tony Hawk checks into the Tipton; Maddie and London has a crush on their fencing instructor. While Zack and Cody are doing their science project, the problem is that Cody has a fear of germs, and when Zack makes a mistake when analyzing a germ from the kitchen and thinks it's a toxic type of black mold, the rumor spreads through the hotel and everyone starts panicking. Cody gets over his fear after he realizes that he can't go skateboarding with Tony Hawk wearing an anti-germs suit.

It's International Day at Zack and Cody's school and Zack decides to ask a guest named Kumiko, a Japanese opera singer, to be his project. After Zack loses Kumiko, Carey and the boys must fill in as Japanese singers for a convention being held at the Tipton. Meanwhile, Maddie and London get trapped in London's closet.

London spreads a rumor she started about Maddie, and Maddie accidentally spreads one about London. Cody wants to look different, because people kept on thinking he was Zack. Cody has Zack fill in for him on an interview, because of a certain problem.

Zack receives help for a history report from Mr. Moseby's grandmother, when she comes to visit. Meanwhile, Mr. Tipton forces London to get a job.

A twins convention is being held at the Tipton Hotel. Zack ends up creating a double date with twin sisters, for him and Cody. London and Maddie end up enjoying a evening with twin brothers.

When the Tipton holds Health and Fitness week, everyone begins to examine their eating habits. Cody helps Chef Paolo in an attempt to lower his cholesterol, while Carey begins to limit Zack’s sugar intake. Meanwhile, London and Maddie participate in a charity fashion show where they are both criticized about their looks, each taking drastic measures to change.

Cody is graduating from 8th grade as class valedictorian. But Zack is horrified to learn that he has to attend summer school and tries to hide it from his parents. Meanwhile, Maddie becomes a camp counselor at a run down facility with less than ideal girls under her wing.

Prince Sanjei comes to the Tipton to be crown king, but when he tells Zack and Cody he wants to try being a regular kid, Cody poses as him, and Zack takes Sanjei to the mall. Meanwhile, London thinks she saw a UFO, so she invites Maddie over to stay up and look for one. Maddie though, is in it just for the free food and service.