Antony Acker

The boys arrange a free cruise holiday for themselves and their mother. She's delighted, but they haven't told her it's only free if she sings on board every night.

The Tipton is holding a Health and Fitness week. Cody encourages Chef Paolo to cook more healthily, while Zack's mother tries to get him to amend his eating habits and cut down on sugar.

Cody helps London to produce her own online web show. Zack becomes addicted to the online web game, and doesn't realise that his fiercest opponent in cyber space is actually Moseby.

Cody gets jealous when a famous teenage Russian violinist enrols at their school and flirts with Barbara. London tries to learn the hotel business by shadowing other employees.

Arwin's mother moves out and the twins feel sorry for him. They invite him to dinner but afterwards he won't go home. Zack and Cody give his home a makeover to make it more attractive.

Zack tries to negotiate a better contract for Carey, but almost succeeds in losing her job for her. Nia and London both ask Cody to help with their science projects.