Carol turns 29 and feels unfulfilled. She quits her job to explore other options. Carol joins one of Bob's group sessions and as the group explorer's Carol's feelings, Bob is asked how he feels. The group treats him as just another member.
Howard's sister Debbie, visits, and he wants to remove all signs of his dating habits. He thinks she is young and impressionable. Debbie arrives and Emily sets her up on a date. Howard turns over protective.
Emily & Bob look at a house for sale and sign a contract. After they worry about what the change will mean for them if their contract is accepted. Luckily for them, the contract is not accepted and they are happy.
Bob's therapy group had a great session and Bob is reluctant to take a vacation during this time. Bob & Emily have a 63-day cruise scheduled and he thinks it is too long to be away. His patients encourage him to go.
Bob's therapy group pressures him to hold a session on Public TV. This show sure won't be rerun during pledge week. By turning down the station's offer, Dr. Bob Hartley was trying to protect the members' privacy, but the patients worry that he's ashamed of them. Everyone agrees to be as open as usual. Opposite Gunsmoke plus the Bears on Monday Night Football with Dandy Don and Cosell, few Chicagoans will be glued to Psychology in Action anyway.
Bob & Emily have vacation plans to visit Mexico. Bob seems hesitant, but he says he is excited to go. At work, a patient thanks Bob for the session and whacks him on the back - throwing his back out of whack and in pain.
A minister goes to Bob professionally. While the minister loves what he is doing, people treat him differently outside the church when they know he is a minister. After some therapy, the minister announces to the parishioners his new plans.
Emily's recently divorced friend moves into the apartment complex as Bob & Emily. Marilyn meets Howard and they go out for hot chocolate. Emily takes Marilyn to Bob's work where she meets Jerry. Jerry and Howard compete for her affection.
Emily becomes certified to give IQ tests and has Bob take one. The results of his test show Emily's IQ is a lot higher than his. They attend a banquet for geniuses and Bob feels out of place because everyone acts superior.
When Bob finds out how much the plumber charges him for a repair, he realizes he is undercharging his therapy group. He raises the price, but the members think it is too much. They hold meetings without Bob until they realize they need him.
Howard's son Howie is visiting. Howard tells Bob that he and his ex-wife are getting along really well lately and he thinks she wants to get together again. Howard is upset to find out she is getting married and wants Howard's approval.
Emily's parents pay an unexpected visit to Bob & Emily. They are the opposite in personality from Bob - exuberant, joking, and over the top. Bob feels left out of the comradely with Emily and her parents.
Bob has to go to work for one appointment on Christmas Eve and then go home for a small Christmas celebration with Emily. Events conspire against him as his patient has a break down, the weather turns hazardous, and he has to walk home.