The fourth season concludes with a romantic cliffhanger as Reggie and a new neighbor each vie for John's affection. Also, Linda takes Margaret out for a night on the town, which Margaret lives to regret.

Reggie gets jealous when she assumes John has feelings for a new neighbor and tries to tell him how she feels; Linda sublets her job to a woman even more incompetent than she is.

John receives eight expensive steaks from a patient and is compelled by his new neighbor into throwing a party.

John grows paranoid after his laundry, mail and apartment are tampered with, and the sunny disposition of a new woman (Nancy Travis) at the diner only makes him feel worse.

John is a reluctant sex therapist for a couple in their 80s; Reggie is harassed by a man trying to sell her a new freezer.

Reggie is obsessed with helping Jake achieve some of the goals he set for himself in sixth grade, but her good intentions backfire; Linda saves a man's life and then drives everyone crazy with her superior attitude.

When a patient loses the ability to speak, John gets him a machine that talks for him, but the man uses it to lash out at people; Bob turns into an environmentalist to impress a girl; Linda accuses Margaret of stealing her bracelet.

John is infuriated when an unflattering picture of someone else is published alongside his article in a national medical journal, so he pays the editor a visit; Arnoldo asks Linda out on a date.

Parents are enraged when they learn that John's talk on nutrition to a class of 8-year-olds turns into a discussion about sex; two cops use the diner for a stakeout. 

John worries that women no longer find him attractive after Jake's girlfriend makes a disparaging remark to him; Linda fears that a pretty temp is going to replace her.

John tells a discerning bartender about his horrible day and tries to get out of going to his ex-wife's wedding on Valentine's Day.

John agrees to give free medical care to Bob, Reggie and Jake in exchange for repairs, food and magazines.

Reggie starts dating one of John's recently divorced friends, but she can't stop obsessing about the guy's former wife.

John's day is filled with wacky people, from two guys who want a prescription for marijuana to a man who is upset when he learns that he isn't dying. Meanwhile, Jake challenges Bob to a game of scrabble.

John reluctantly agrees to buy a poor child a Christmas gift and then discovers that he has to deliver it as well; Bob visits his mother who still treats him like a kid.

John believes his no-strings, no-pressure relationship with his latest girlfriend is perfect---until she leaves him for another man. At the diner, Bob boasts about finding a Super Bowl ring in the backseat of a cab. And at John's office, Linda tries to talk her parents out of getting a divorce.

Reggie becomes attracted to a married man and considers having an affair; Linda starts bossing everyone around after she takes assertiveness classes.

Jake encounters a depressed man who is about to hang himself, so he takes him back to the diner to cheer him up; John learns that a patient's wife is pregnant by another man.

John hurts his shoulder and is afraid to have an MRI, so Reggie goes with him for support; Linda dates identical twins.

John takes Reggie's advice that he should tell women that he's sorry when he disappoints them, only to have it backfire; Jake and Bob switch jobs for the day.

Reggie and Jake help a man who claims to be homeless, but John thinks he's a con artist; Margaret takes a second job caring for a wealthy woman's dog.

Everyone's shocked when Jake announces that he got married over the weekend to a woman he met at a friend's wedding.

John is more irritable than usual when he tries to quit smoking; Reggie believes a friendly customer stole all of her good luck and left her with his bad fortune.

John is ordered by a judge to see a therapist to help him work on his problem with authority. Also, Jake grows weary of his new girlfriend's annoying habit of describing every little thing she's doing.