Cate orders Kerry, Rory, and Jim join the YMCA where Bridget works.

C.J. is shocked and delighted when he meets his biological father for the first time. But Jim doesn't trust the man and thinks he may have ulterior motives for the visit.

Cate is unprepared for the diverse reactions exhibited by Bridget and Kerry on their first day back to school since their father's death. Meanwhile, Jim tries his best to be helpful by making some questionable home improvements to the Hennessy home.

Cate persuades Rory to try out for basketball because that would've made his dad proud.

The Hennessy household and Jim are thrown for a loop when Cate's wayward nephew C.J. stops by to pay his respects to Paul and generally keep them company.

On the advice of the family therapist, Cate is encouraged to pursue her dream of becoming a singer. Meanwhile, C.J. and Jim find themselves trying to bond in a bar when Cate encourages C.J. to take his grandfather out after he is dumped by his wife in a letter. Kerry angers Bridget by dying her hair blonde after she complains that the romance is fading from her relationship with Kyle.

Upon discovering Cate in the arms of Artie, Bridget and Kerry decide to blow off their planned trip to their grandmother's and take to the open road to sort out their feelings. Meanwhile, Rory continues to pine for Rachel Sharpe, who confesses her true feelings for him.

Cate banishes C.J. and grounds Bridget for going to C.J.'s college keg party. Jim has to take a written drivers exam after being pulled over with an expired license.

After witnessing some strange behavior from Bridget and Kerry, Cate tries to find out what they are up to. Meanwhile, C.J. and Rory doubt Jim's ability to put an engine back together after he falls in love with a classic car.

When Bridget is busted over a school dress code violation, Cate is called upon to meet with her new principal. But Cate is in for a shock when she discovers that she went to high school with him. Meanwhile, when C.J. becomes his massage therapist, Jim hurts his feelings when he refuses to admit that his grandson has become good at something.

The kids question Cate's motives when they return from their summer getaways and discover that she has bought a new bed and changed her hairstyle. Meanwhile, after traveling through Europe over the summer, Kerry met and had a fling with a boy - which leaves Bridget jealous and Kerry wondering what to do about boyfriend Kyle; new high school Student Body President Bridget is convinced even further that life is a popularity contest after taking a trip to Washington, DC over the summer; and after a depressed Jim fails to win back the affections of his wife in Florida, Rory attempts to help him quit smoking -- which is complicated by Jim's discovery that C.J. was responsible for their irreconciliation.

Kerry is livid when Bridget unintentionally makes a mockery out of her art project at the mall. But she forgets about Bridget when a fellow artist asks her out on a date. While C.J. finds himself striking out at speed dating, Jim discovers that he's a hit with the ladies.

To keep C.J. from spending Christmas alone in Las Vegas, the Hennessy household bends over backwards to recreate one of Cate's first holiday memories to entice him to stay. Meanwhile, Rory decides to break up with his wealthy girlfriend when he fears that he won't be able to buy her a Christmas gift worthy of her upper class status.

Cate's alleged antics at Kerry's volleyball game threaten to make her team forfeit the match. Meanwhile, C.J. has a crush on Kerry's volleyball coach and Bridget becomes upset when one of her friends begins dating her ex-boyfriend.

After falling asleep while watching Freaky Friday, Cate awakens to find that she and Bridget have switched bodies. C.J. and Jim have also trade places as well as Rory and his hamster. Only Kerry is spared and enjoys their predicament.

Valentine's Day finds C.J. in a predicament when he commits to two different Valentine's Day dates. Meanwhile, Bridget's excitement over being elected to the court of the Valentine's Day dance quickly turns to shock when she discovers that Cheryl is also in the running.

Paul's job as parental guardian becomes more of a full-time position when Cate is up for a promotion and has to spend more time at the hospital. After Paul introduces Rory to baseball card collecting, Rory trades the cards for something not exactly associated with the sport.

Officially a full-time teacher, C.J. is overjoyed to finally get access to the teachers' lounge. But he soon finds himself being bullied out of the room by the school's overzealous Home Ec instructor. Rory wants to impress a girl, so Bridget and Kerry take it upon themselves to give him a full-fledged makeover.

When Paul is asked by race car driver Carter Tibbits (Jason Priestley, "Beverly Hills 90210") to write a book about him, Paul brings the family to Tibbits' mansion to meet the driving legend and his sarcastically dry-witted butler, Cody (Robert Guillaume, "Benson," "Sports Night") -- who used to be Carter's crew chief. But a misunderstanding leads Rory to steal a photo from Carter's room, and it's Paul who's under suspicion when a security camera catches him trying to return the item.

Paul is left home alone with the kids while Cate is at a seminar on the day of the big Michigan/Ohio State football game. But much to Paul's dismay, the game soon takes a backseat when Bridget is accused of shoplifting and Kerry gets upset over her latest cause.

Paul seems to be the only one looking forward to a family Halloween, as Bridget, Kerry and Rory make plans to spend the spooky evening away from home and with their friends. But Paul's wish to relive the past by having the family get together for one last Halloween campout in the old treehouse may turn out to be the biggest nightmare of the evening.

Paul tries to find perfect gifts for the family to make up for last year's Christmas fiasco. Kerry finds a stray dog during the holidays. Cate is overjoyed when she is asked to sing a solo at the church's midnight service, but fears that seeing her family there will make her nervous.

After a party at Tommy's house is broken up by the police, Paul chastises his friend and unwittingly volunteers to host the next one. But when the party gets out of control too, the kids think of him as a cool parent, while the neighborhood parents think he's just as unreliable as Tommy.

Bridget and Paul are surprised to find themselves in similar situations when they are both alienated in their social circles. But they devise a plan to settle the score, leading Paul to crash a poker game with Tommy to get closer to boss Nick, and Bridget trying to break up ex-boyfriend Kyle and her nemesis Jenna.

While vacationing in Florida at Cate's parents' home, Paul and Cate catch Bridget and Kerry on the news partying with a group of Spring Breakers. But the news runs archival footage that features a young Cate letting loose in a bar. Meanwhile, a jealous Paul meets Cate's college boyfriend Byron and Rory befriends an elderly gentleman whose stories about World War II turn out to be more fiction than fact.