It's a stag Thanksgiving for Bob when Emily flies off to join a family reunion, leaving Bob to share the holiday with his male buddies.

Bob strikes out against a friend's fear of falling, but succumbs to the same phobia himself when he is subjected to a harrowing elevator experience.

Bob finds himself with unhappy and hostile patients who refuse to attend his Christmas party when they are mistakenly informed of a rate increase at the height of the Yuletide season. One patient is moved to hire a pie-throwing service.

Bob gives up his psychological practice in Chicago to become a professor at a small college in Oregon.

Bob becomes the ""oldest permanent psychologist in Chicago"" when the ceiling in his office collapses and he has to set up shop wherever he can find the space.

The Hartleys miss their friend's gala Fourth of July Bicentennial party celebration when they become trapped in a storage locker.

Bob's impulsive decision to leave town for a week is received with disastrous emotions by his patients, who seemingly can't make it without him.

Bob invites Emily to join his fear of flying group on a trip to New York City. Much to Bob's surprise he finds that Emily also has a fear of flying and refuses to go. After a conversation with Howard she decides to go only to back out after boarding the plane.

Bob suffers an inferiority attack when a test reveals that Emily's IQ is higher than his.

Emily's plans for a wonderful turkey dinner go downhill when Bob's mother and Emily's father begin insulting one another the night before Thanksgiving.

Bob's patient Elliot Carlin parades all his phobias and insecurities as he prepares to ask Carol Kester for a date. He then finds it even harder to accept her answer—which is ""yes.""

With his confidence fading as fast as his list of patients, Bob decides to follow Emily's advice and see a psychiatrist about his problem.

Christmas Eve finds Bob in the hospital with tonsillitis and an impending operation. Meanwhile, his friends are all suffering from an attack of Christmas-itis.

Bob is held hostage in his office by a friendly bank robber.

It's Vocation Day in Emily's class, and Bob feels left out when he's not invited. At the last minute, he's asked to fill in, but Emily's worst fears are confirmed when Bob fails to excite the kids' interest.

Howard "floats" into Bob's office on Cloud Nine after having a tooth pulled. He is so poetic that Carol tells Emily, "I want him." Emily agrees to help Carol get him, and the two have an up-and-down romance.

Christmas becomes a sad memory for Bob's group therapy session, and it's evident that "'tis not the season"" for everyone to be jolly. Bob decides to invite the group over for Christmas Eve.

Rev. Dan Bradford seeks professional advice from Bob then makes a startling announcement in his Sunday sermon.

Bob decides to meet the rising cost of living by raising his rates. But the members of his therapy group revolt when he picks the most inappropriate moment to tell them.

Christmas Eve is almost spoiled when Bob is trapped in the office because of a power failure.

Bob's patients observe tradition by planning a surprise party to honor the fourth year of the group's therapy sessions. When an unseen member, a Mr. Gianelli, threatens to turn the party into a disaster, Bob kicks him out of the group. His decision meets with instant group approval until Mr. Gianelli dies under a ton of zucchini.

Bob accepts a seemingly innocent invitation to appear as the guest on a TV discussion program. He winds up in the jaws of a dilemma when the show host turns out to have the disposition of a shark.

The Hartley apartment becomes a hot and cold battleground when the good doctor declares psychological warfare on his landlord.

The Hartleys embark on a seagoing vacation to put work behind them. But Bob can't resist playing psychologist when he undertakes to counsel a married couple.

Bob advises a patient named Mr. Plager to realize his human potential by writing a play based on his own experiences. But when Plager writes, directs, and produces an actual World War I drama whose characters bear a startling resemblance to the rest of Bob's patients, the warfare really begins.