Jordan's brother and sister return, but Dr. Cox learns that his brother-in-law Ben hasn't visited a doctor about his cancer in the two years he has been gone traveling the world.

A new patient at the hospital wakes up and sees everything happening around her as a musical. Carla can't decide whether or not to return to work and Elliot must find a way to tell J.D. he can't move into her new house with her.

J.D. is planning on leaving Sacred Heart but before he goes there are a few things that he wants to do including; getting a hug from Dr. Cox, and learning the Janitor's real name. Elliot is ready for the next step in her and J.D.'s relationship and she begins moving her furniture into J.D.'s apartment.

The three interns are each assigned patients with various illnesses. Statistically speaking, one of the three is going to die. J.D.'s patient is 86 year old Mrs. Tanner, who is in renal failure. 20 year old David Morrison is Turk's hernia patient and Elliot's patient Mrs. Guerrero only speaks Spanish and might have lupus.

In a "Wizard of Oz" homage, J.D. is trying to go home, Turk searches for a heart donor and Carla worries, that she doesn't have the courage to become a parent. Meanwhile, Elliot doesn't believe, that she has the brains to lead a question and answer session. Also, the Janitor is painting color coded lines throughout the hospital for easier navigation.

J.D. asks Dr. Cox out for lunch, but runs into annoying former patient Jill Tracy, who unexpectedly teaches him something about responsibility. Elliot and Carla discover that Todd has been lying about all his hospital "conquests" and suspect that he's been less than truthful about other issues. Turk warns them not to meddle in his affairs.

Jordan's brother Ben is admitted at Sacred Heart for having an accident with a nail gun. J.D. learns that Ben has leukemia, but won't believe it, since there have been many mixups in the hospital lately, so he goes on a search for the real test results.

J.D. and Turk make a huge sacrifice concerning a decade-long steak night tradition for a dying patient. Meanwhile, Dr. Maddox, the new Chief of Medicine, begins to show her true colors.

J.D. believes he may have finally found a mentor in Dr. Kevin Casey, a surgeon with obsessive-compulsive disorder, and it turns out that Dr. Cox has always been jealous of the guy. Meanwhile, the Janitor and his new assistant help Kelso out with a garbage problem.

J.D. ditches a seemingly uninterested Kylie for Dr. Molly Clock, who just returned from Milwaukee. Carla fumes over Turk's frequent phone calls to an ex-girlfriend. The Janitor and Dr. Cox make a wager over Elliot.

J.D., Turk, Elliot and Carla are interrogated about the mysterious death of a patient. Dr. Kelso learns, that J.D. and Turk were away tracking down a patient, Elliot was traumatized over finding out that her make-out buddy was married and Carla was busy recruiting hospital personnel for a group lottery purchase.

Turk and Carla start to have issues when Carla tries to change everything about her new husband. Molly Clock (Heather Graham), the hospital's new psychiatrist, becomes friends with Elliot because she believes Turk, J.D. and Carla are shutting her out. Also, when Turk and J.D.'s car blows up, Carla lets him pick out the new ride only to find that instead of a car, he buys three scooters for them, further proving Carla's point that she needs to always be in control. The episode guest stars the Sugarhill Gang.

When Dan resurfaces, J.D. is shocked to learn his father has passed away. The reactions from his co-workers help J.D. a little, but the one person, Dr. Cox, who he wanted to be there for him is too busy with J.D.'s patients. Meanwhile, Dan sits drunk in the bath tub the whole day and Turk finds out he has Type II Diabetes.

When J.D. meets a former writer from his all time favorite TV show "Cheers," he begins to picture his life at the hospital as a bland, multiple camera sitcom, where everything is perfect and wraps up nicely. Back in reality, Cox is relunctant to fire an amiable cafeteria worker, while Turk and Carla struggle to keep their promise of constant romantic affection afloat.

J.D. meets the klutzy Julie, and when he becomes smitten, Elliot attempts to help out with romance advice. Meanwhile, Carla tries to find Dr. Cox's soft side, when he refuses to kiss his son. Turk and the Janitor put together an air band to win a contest, but Kelso gives them a tremendous obstacle.

Dr. Cox starts drinking after his decisions result in the death of three of his patients. The staff tries to cover for him at the hospital, while everyone tries to convince him how inspiring he is for them. Turk starts his new rotation with orthopedic surgery, but isn't so fond of his attending doctor's touchy-feely methods. Thus, J.D. and the Janitor attempt to help Turk find ways to bond with his new supervisor.

Ben takes the news of his diagnosis pretty well - at least better than his sister Jordan and J.D. Remarkably, it is Dr. Cox who is the voice of reason and compassion, until his own fears get in the way. Meanwhile, Turk and Elliot have their own issues to deal with. Turk is upset because he wasn't chosen to assist on a difficult surgery and Elliot is criticized during rounds by Dr. Kelso for the 100th time.

It's J.D.'s last day as an intern, and soon he will become a resident. Carla and Turk are arguing about dating other people. Elliot finally rebels against being everyone's doormat, and J.D. is just trying to stay out of people's way. Jordan has returned to get a physical and a new patient, Mr. Bober, has been admitted, because he needs his gall bladder removed. He really needs the surgery, but doesn't have the insurance to pay for it. They enlist the help of Dr. Cox, Dr. Wen and Jordan.

An ever present butterfly prompts the question on what could have happened different as Turk looks for his lucky do-rag for surgery, and Elliot tries to find a lost stuffed animal for a child needing a bone marrow transplant.

J.D. takes matters into his own hands, when searching for a relative for his favorite patient. Meanwhile, Elliot is fed up with coworkers not taking her serious and discovers, that she can get her way by flaunting her femininity with some help from Carla and Jordan.

When J.D. has to address a bunch of pre-med students about what it's like to be a doctor, he strays off the beaten path and chooses to discuss his best moments as a doctor instead. When he challenges the rest of the staff to do so, they all remember their best memories in the medical field. Meanwhile, Elliot is forced to face her fear of children, when she must befriend a ten year old boy, whose father is being treated in the I.C.U.

Dr. Kelso dons scrubs to prove a point to Dr. Cox, only to watch it backfire, when an obnoxious patient refuses to listen to him. J.D. and Turk party, while Carla struggles to find solace in Elliot.

J.D. is asked to introduce Dr. Kelso at an awards dinner, so he wants to find out something good about him. Dr. Kelso and Dr. Cox each have a patient, whom they feel deserves the benefit of a new experimental treatment, but there is only one open slot. Elsewhere, Carla and Turk try to help Elliot get her old job at Sacred Heart back. And the Janitor taunts J.D. with the made up game of "Jiggly Ball."

J.D. is annoyed, that Julie doesn't laugh, so Elliot encourages him, to tell her his feelings, and Turk tries to use psychology to fix the issue. Meanwhile, Carla is upset, when the Janitor refers to a new nurse as a "hot young Carla," which intensifies her growing concern, that she is too old to conceive.

Elliot meets a nice guy at the bar, but freaks out when she finds out he's a male nurse at Sacred Heart. Turk keeps asking Carla to marry him, but she still won't give an answer. Dr. Cox feels the pressure he puts on himself everyday: His psychiatrist, his subordination to Dr. Kelso and his paternal feelings for J.D.