Max ends up kissing Zack, after winning a basketball game. Maddie helps London with her shopping problem, because of something said by London's father. There is a surprise involving Carey and a certain someone.

Maddie helps London become smart to win over the affection of a scholar. Meanwhile, Cody moves into the coat closet and makes it is own room after he has enough of Zack's sloppiness.

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.

Zack and Cody rent out London's Suite while she is out of town so that Stacie, a cute girl from school can have a sleepover birthday party at the hotel.

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.