Josh and Julia face their past; Sally is offered a job; Aidan and Suren get rid of Boston’s fringe vampires.

Sally finds out who has been haunting her; Josh tries to reunite with Nora.

Aidan is hounded by his past; Sally finds out her mother is dying.

Aidan’s relationship is taken to a new level; Josh’s search for a werewolf cure continues.

Aidan tries not to go back to his old lifestyle; Josh meets a brother and sister werewolf; Sally connects with an old friend.

Josh and Nora prepare for another “change”; Sally looks into reincarnation; Aidan dates a human.

Josh deals with his relationship with Nora; Aidan helps Suren; Sally discovers new ghostly powers.

Aidan deals with vampires; Josh prepares to reenter medical school; Sally’s powers strengthen.

Nora finds out the truth about Josh; Sally misses her “door”, but gains new powers; Aidan has a final showdown with Bishop, with surprising results. We also see how Aidan and Josh first met.

After his break from the Family, Aidan is afraid that Bishop will try to hurt him and his friends. At the hospital, he encounters a former lover, who has come to the hospital to die. Josh runs into Nora, and is afraid about possible complications in her pregnancy. Meanwhile, Sally finally finds a way to hurt Danny.

Rebecca walks out on Aidan; Josh has romantic troubles; Marcus is worried that Bishop suspects he is a traitor and Sally faces off with an exorcist.

Josh is forced into “dog” fighting. Aidan is forced to play the good “son,” while the elders are in town, and Sally has to act as a mediator between the two.

Bernie is seriously injured in a car accident leaving Aidan to make a tough decision. Josh wants to slow down his relationship with Nora. Sally meets an old crush, who is also a ghost.

Sally gets bombarded by ghosts at the hospital; Josh is hesitant about his date with Nora.

Josh has an odd and interesting homecoming. Sally attempts to protect Bridget from Danny but fails. Aidan deals with the aftermath of Marcus’ attack.

Aidan receives a “video postcard” from an old friend. Sally takes Aidan up on his offer to “take care of her problem.” Josh’s sister moves in with them which causes problems for the roommates. Josh goes on a date with a nurse from the hospital.

Aidan has his hands full with a problem created at Bishop’s request. Sally remembers the details that led to her death. Josh learns the truth about the night that led to his change.

Josh meets a werewolf who teaches him how to accept the change and is more than meets the eye. Aidan begins a dangerous relationship with an acquaintance. Sally learns that she needs to stop interfering in the lives of those she left behind.

Sally meets a ghostly new friend who teaches her how to cross physical boundaries like the apartment. Josh gets roped into the Neighborhood Watch against his wishes. Aidan is recognised by the son of one of his past victims, who is determined to confront Aidan about his father’s murder.

Sally begs the guys to call Danny over so she can try to make him see her presence somehow. Aidan, while trying to fight off Cara’s unwanted admiration, receives some shocking news about someone who he thought was dead. Josh discovers Aidan’s involvement in the Rebecca incident and confronts him about it; at the same time, Josh is also struggling with whether to tell his sister the truth about himself.

Josh is miserable after his latest full moon transformation resulted in him waking up next to a bloody dead deer in the woods. Aidan suggests that he and Josh should live together so they can watch out for each other. When they’ve found the perfect apartment, they realise the place comes with its own ghost, Sally

Carey joins the boys while they’re in Japan when she’s selected to star in a soda commercial by a businessman who’s taken a liking to her when he saw her perform at the Tipton. Shooting the commercial is difficult enough since the soda is flavored with shrimp and tastes awful. Things get worse when Zack smashes an expensive camera and the family has to pay for it by becoming tasters at the soda factory. Meanwhile, Woody is able to defeat a sumo wrestler in the ring to win an unlimited ship gold card. However, having lost his confidence, the wrestler continuously hangs around Woody, getting him annoyed to the point of facing him in the ring again in hopes he finally leaves the ship. Also, London does everything she can to avoid going to the dentist.

Zack and Maya are officially together and she hopes he’ll be able to attend her poetry reading on stage. The trouble is it’s scheduled at the same time he, Cody, Woody, and Mr. Moseby are competing in an online war game for the championship against an Australian team. As a result, Zack splits his time between the two events. Meanwhile, for a community service project, London and Bailey run a daycare program for young children who seem to prefer London and Bailey doubts herself until trouble arises.

Maya’s birthday is coming up and Zack decides to do something special for her. When singer Sean Kingston comes on board, he immediately becomes attracted to London. Zack misleads Sean Kingston into throwing a surprise party for London and also making Mr. Moseby believe it is for him, when it is actually a party for Maya. Meanwhile, Cody goes with Bailey to a Belgian chocolate factory on a couple’s tour and runs into Woody who mistakenly came instead of attending a hiking trip.

Arwin comes on board the SS Tipton to improve the ship by adding a robot. However, problems start to occur when it begins to have feelings for Cody. Meanwhile, London and Woody enlist Zack’s help to pass a gym class.

When the new aqua lounge is flooded, Mr. Moseby vows to expel the student responsible for the mess. Although Mr. Moseby assumes Zack is the culprit, Cody, Bailey (who had just returned from Kettlecorn), and Woody all believe they are each responsible for the disaster for different reasons. Meanwhile, Marcus leaves the ship to make a Broadway musical based on his hit song “Retainer Baby.”

Zack, London, Woody, and Maya are all trapped in London’s shoe submarine with only enough air for thirty minutes. Meanwhile, Marcus helps Cody prepare to play chess against a beautiful Russian junior champion.

Zack becomes attracted to a girl named Maya, but when he realizes he is actually falling in love with her, he attempts to use the six month plan Cody devised to date Bailey. Meanwhile, Dante, the boy who stole Marcus’s identity in Paris, stows away on board to have Marcus produce his next album. In addition, Cody is trying to condition himself to forget about Bailey by flicking a rubber band against his wrist every time he thinks about her while she is visiting her home in Kettlecorn.

The Seven Seas High dance is coming up. Having broke up, Cody and Bailey lie about having dates to the dance, so they quickly try to find a backup date to backup their lie. Now the pressure is on to see who has the best game. Meanwhile, Woody is tired of Tutweiller and Moseby arguing about who should get the skydeck for the school dance, so he makes them share the skydeck. It is revealed though flashback that Mr. Moseby and Miss Tutweiler’s interest in the Middle Ages and 1980s, respectively, comes from the tribulations they endured as outcasts in their youth. Through understanding, Mr. Moseby convinces Emma that they both have become successful adults and have overcome their painful pasts.

No longer a couple, Cody and Bailey must choose who keeps Buck, their pet rat. Kirby investigates both to see who will make the better owner, but Woody is bitten by Buck, creating a super-hero alter-ego “Ratman.”

Cody leaves the ship following his break up with Bailey to join an elite, non-religious, monk-like club which he hopes will help him get over the break up. Zack and Woody are determined to go there and save Cody. Meanwhile, London and Miss Tutweiller try to console Bailey by giving her relationship advice.

Cody and Bailey are planning to celebrate their one year anniversary when the SS Tipton docks in Paris. Cody asks London to help him make his date perfect. However, a big misunderstanding begins when Bailey sees Cody with London (who were just practicing the date) and mistakes her as the “hideous French girl”. The next day, the day of the anniversary, Cody sees Bailey with another guy, Jean Luc, who was just trying to cheer her up. Bailey and Cody start arguing about the misunderstanding, and decide it would be better if they broke up. Meanwhile, Zack and Woody are pursued by art thieves.

Bailey bets London $1 million dollars that she cannot go on one week without insulting her, so London asks Mr. Blanket for help to try not to insult Bailey. When Bailey loses the bet, London insults her one million times. Meanwhile, Cody attempts to avoid the assaults of a seagull after not permitting the seagull to eat fries.

Centuries in the future, Starship Tipton resident prankster Zerk (Zack’s great-great-great-great-great grandson) plays a joke on feuding aliens and because of it, they vow to destroy the starship. The kids must travel to the future to save their descendants and fix the problem before it’s too late. Meanwhile, London discovers that she has a great-great-great-great-great grandson, Rome, and that the Starship Tipton belongs to her family.

While producing a news show for Ms. Tutweiller’s class, each of the kids find their own set of problems. Zack and Bailey clash as co-anchors, Cody makes a shocking discovery linked to London during his investigative reporting, Kirby reminisces about the good ole days, while London is having trouble with the green screen.

The SS Tipton is going straight in the path of endangered blue whales motivating Zack, Cody, Bailey, and Marcus to try their best to change the ship’s course. They lock themselves into the engine room hoping the whales will safely pass, however they discover it’s not as easy as it seems. Cody begins to faint due to heat exhaustion, Marcus becomes desperate for water, and Zack loses it and tries to break free. Eventually, Kirby and Mr. Moseby break into the engine room to attempt to stop them, but after seeing the whales on Cody’s laptop, they decide to go along with plan.

Cody wants to buy earrings for Bailey, but Zack insists he bargain with the cashier for a better price. Meanwhile, London, Bailey, Marcus, and Woody discover a magic lamp that contains a genie willing to grant wishes, causing them to argue over which wishes should be granted.

When Mr. Moseby leaves to go to a reunion, Zack and Marcus decide to throw a party on the sky deck with models. Janice and Jessica, from the Boston Tipton, come aboard the ship as models and while Janice tries to draw Zack’s attention, Cody believes Bailey is jealous of Jessica. Meanwhile, to distract the modeling agent from discovering the party, Woody pretends to be a male model named Woodlander.

A class assignment requires the students to simulate marriage to learn the challenges that face married couples in everyday life. Cody ‘marries’ Bailey, Zack ‘marries’ London, and Woody ‘marries’ Addison. However, when the “Wheel of Life” gives Cody as injury, he and Bailey begin to fight.