Doc - Season 4 (2003)

Clint treats a baby that has PCBs in her system. Clint tells the Barnes family that all have PCB in their bodies to the fish they ate. Clint decides to talk to the CEO of BND manufacturing, Clint only gives himself and Westbury trouble.

Captain Steven Doss launches Operation Rules Of Engagement as a way of asking Tippy to marry him. Clint treats a young boy named Jordan for ADD. He notices something else is wrong when Jordan doesn't hear Clint calling his name. Clint tells Jordan's parents that he has auto immune inner ear disease.

Nancy finds love letters in an old desk; meanwhile, Raul gets to play Romeo but soon wants to quit the play because Kylie didn't get the part of Juliet.

Donny suddenly learns he has an inheritance. Clint tries to advise Donny on how to handle the money. Clint learns Donny's cousin Ray may try to keep him from getting the money. Raul learns how to handle an allowance.

Dr. Crane and Clint train Kyle, a medical student, to help treat patients at Westbury. After Kyle misdiagnoses a patient, Clint wonders if there is something much worse going on with him. Kyle tells Dr Crane and Clint that he has peripheral neuropathy.

Clint treats Heidi for pain that he feels will go away with rest. When the pain continues, Heidi's coach think her pain isn't real. Meanwhile, the staff at Westbury must pass a test to get an A+ rating. Clint asks to look at Heidi's medical records. Clint learns not to judge his patients so quickly and listen more.

Clint wonders if Colleen is going too far when she gives him a Porsche; Colleen's son sues Clint for inappropriate doctor-patient conduct, suspecting that Clint just wants Colleen's money; Clint learns that Colleen is dying of a cerebral aneurysm.

Derek learns that his daughter got a modeling contract; Nancy tries to catch the thief who stole her purse, but when she gets to the suspected thief's apartment, she learns she might have picked the wrong guy: he doesn't recall taking her purse because he has diabetes.

Shannon, Nancy's old college roommate, comes by the clinic complaining of feeling tired all the time. Nancy isn't happy to see her because Shannon dated all the boys. Clint runs tests on Shannon come back negative, that is until Clint runs a heavy metal toxicology screen to find out if arsenic is making her sick.

Joe comes to town and tells Clint about his dad who died when he was ten. When Clint tries to find Joe, he learns that he was let go from his job. Joe learns that he has Alzheimer's. Joe must use what time he has left to get close to daughter and also help Clint understand who his dad was.

Donna DeWitt has a new beau named Brian who has secret that he has been hiding for three months. Donna shocks everybody with an engagement ring from Brian. Everyone at the clinic wonders why everything happened so fast. Brian falls in love with Donna over lunch and wonders if Brian's daughter Emma would be okay if she were to marry Brian. While at lunch, Brian is rushed to Westbury where Clint learns that Brian has cancer. Brian asks Clint not to tell Donna.

A delusional teenage girl named Lacy Sanders thinks that she is Bonnie Fisher, the author of "Cusp of the Day". The only way that Lacy will come to terms with her true identity is if Bonnie Fisher herself helps her.

Clint tries to figure out why an obese young boy named Clayton has trouble losing weight. Clint learns that Clayton's parents may have something to do with the fact that there son isn't losing the weight that he needs to lose. Tippy tries to plan her wedding with the help of her cousin but things only get worse as Tippy begins planning her wedding to Captain Doss. Tippy has trouble finding an appropriate veil to where. Captain Doss breaks his leg after being told to take it easy on crutches.

Dr. Crane tries to reconnect with his father whom he hasn't seen in 30 years.

Clint treats a man with Asperger's Syndrome named John, He wants to lead a normal life but his mother is afraid that this would only cause him heartbreak. Clint and Nancy try to teach John how to overcome his fear of not having his mother to help him. Raul thinks that he is ready to be his own man after becoming interested in New York City messengers.

Nancy tries to save her father's store from being condemned. Nate learns that he needs to give a speech to new police officers. Derek tells Nate that a joke might be the best way to get over being nervous. Later, he learns that telling jokes doesn't seem to work very well.

Clint treats a young boy for exhaustion but learns that the boy wants to be just like his father but has trouble meeting his father's expectations.

Friends of Nancy come to the clinic to meet Clint. They later have to make a decision that will affect their twins: they will need to decide whether to terminate one twin's life to save the other.

Tippy's cousin Twyla and her boyfriend Junior have broken up because he didn't like the way that Twyla dressed. Nancy devises a plan to get Twlya together with Junior. Clint and Nancy's plan doesn't go as expected since Twyla falls in love with Clint while Junior falls in love with Nancy.