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.

Dr. Clock tries to reconcile J.D. and Eliot, while waiting to see which one Dr. Cox will give the Chief Resident position to. Molly and Carla are experiencing some subtle conflict and Elliot and J.D. begin to come together after long bouts of conflict of their own.

Dr. Cox is having issues with Jordan, since Ted revealed that they are still technically married due to some filing problems.

J.D. is shocked to hear Dr. Cox tell his interns that eventually, they will screw up and kill a patient. J.D. fears his first time killing someone will soon be upon him.

Elliot becomes unsure, if she wants Molly as her mentor, when she finds out that Molly doesn't have a perfect home life.

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.

When J.D. finds Dan with Elliot, Turk tells him to use the hurt brother excuse to get them to break up, just like Turk uses his diabetes to get stuff from Carla. But then J.D. realizes he wasn't hurt at all...

When Molly takes a job at a different city, she and J.D. end up having a night of kissing, and he tries to rush to sleep with her before she leaves.

J.D. is approached by a malpractice attorney, asking him to do a risky procedure on her father. Meanwhile, Elliot guides Doug to a new career path and Turk struggles to avoid a hypochondriac patient.

With the case against Turk on his mind, J.D. attempts to end it with Neena, but she won't take "no" for an answer and keeps him wrapped around her finger. Carla tries her own way of persuading Mr. Corman to drop the lawsuit.

J.D. takes matters into his own hands, when searching for a relative for his favorite patient.

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.

Elliot starts showing J.D. up as the calmer, more competent doctor. A date with the Janitor leads to an a capella sing-off between his "group" and Ted's band.

A man injured in a bar fight teaches Turk and J.D. a lesson about living life to the fullest.

J.D. has a crush on a girl, who he met at a club, and he's torn about telling her, that her boyfriend has gonorrhea.

J.D. tries to impress Kylie by paying a hobo in the hospital to fake a heart attack, when everything becomes boring due to a quarantine that he caused.

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.

J.D. is thrown out of the apartment.

J.D. ditches a seemingly uninterested Kylie for Dr. Molly Clock, who just returned from Milwaukee.

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.

When Carla and J.D. go out to let Carla have some fun, they get drunk and end up accidentally kissing.

J.D. and Carla get the silent treatment from Turk, who can't seem to control his emotions, after learning about their kiss.

Turk won't open up at couples therapy.

Elliot is torn between moving too quickly and ruining her new relationship with Jake. Dr. Cox teaches Turk about having a healthy ego and Dr. Kelso and the Janitor fight over who gets to use the motorized cart.

With their residencies over, there are big changes at Sacred Heart. J.D. moves out to live on his own, while Turk and Carla consider a family change, creating another rift in their long friendship.