When an inspector shows up and tells them that Jimmy and Christine can't live with Greg and Kim cause of zoning. So they make plans to leave. The inspector tells Greg that if they can get their neighbors to sign an waiver, Jimmy and Christine can stay but he keeps it to himself. When Kim gets upset that Christine's leaving, Greg tells them about the waiver. So while the girls go the neighbors who are easy, Greg and Jimmy have to get Walt, a guy whom they avoid like the plague, to sign.
Billy, a friend of Jimmy's visits - with suitcase in hand. He stays in Kim and Greg's backyard. Billy makes himself at home, setting up clothes lines in the backyard, moving yard furniture, etc. Jimmy gets tickets for the hockey game.
The Warners and Hughes talk about the days when they first met and find out that Kim kissed Jimmy while he was starting to date Christine. Christine and Greg are upset. Greg claims to have kissed a lot of girls and Kim does not believe him.
Christine fears she is pregnant, and then is relieved to find out she is not. She wants Jimmy to get a vasectomy so they do not have any more children. Christine refuses sex until he has the operation.
Kim & Greg are upset to learn that Sammy's pediatrician has retired and sold his practice to another doctor. When they find out he is extremely young, they decide to find other choices. But then Sammy gets something stuck up his noise.
Greg is accidentally trapped into a family trip to Kim and Christine's parents. The mother does not like Jimmy and loves Greg. The house is too hot, the attention too intense, the requests over the top.
The two families decide to go to church with Kim having forced Greg to also go. Kim then tells him he has to go to the Daddies Group; Jimmy also has to go. They reluctantly attend until they find out what the group is really for.
Kim tells Christine she will watch her children if Christine accepts Jury Duty. Kim regrets it as she finds out what it is like to care for three young children. Greg calls Jimmy's mother to help Kim, but the mother is not that much help.
The couples get a baby sitter for the children and go out. But Kim does not have fun because they go to a bar for pool and karaoke. Greg implies Kim does not know how to be fun. Jimmy tries to help her learn how to have fun.
Kim talks Greg into allowing Jimmy's dog to move in with the family. Greg buys a go-cart to retaliate with Kim about the dog. Turns out the dog is not as fun loving at Jimmy remembers ... the dog is aggressive and no one likes the dog.
Greg & Kim buy a new car and plan to use their old mini-van for trade in. Jimmy repairs the van and sells it for more than trade in value. Greg lets him keep the extra above the trade value. Jimmy spends it on a shabby boat.
Christine & Jimmy train Logan to use the potty a simple way; Kim & Greg train Sammy to use the potty, but they use books, musical potties, special panties, toys, and videos. Meanwhile, Jimmy found a loophole in buy and returning items.
Greg decides to go to a gym, but does not do well with the machines and weights. Jimmy helps him to get in shape. Kim and Christine put their children in a Mom's Morning Out program; Kim starts freelance so Christine decides to get a job.
Jimmy has a game of poker with other security guards and Greg feels left out. Christine tells Jimmy to invite Greg to join in the game. Greg joins, but finds the familiarity with security guards from his work a bit unnerving.
Greg gets a ticket in the mail for going through a red light, but it is Jimmy driving the car. Greg is upset that Jimmy borrowed his car. Turns out Christine & Jimmy borrow a lot of items from Greg & Kim. Kim borrows Christine's camera.
It's Halloween. While Trick and Treating, a neighbor in costume scares Sammy; Greg and Kim are annoyed and plan to seek revenge. Kim wants to write a letter to scare him. Jimmy and Christine suggest a different method.
At a family outing, Greg and Jimmy meet a father who spends more time with his children than they do. Jimmy is OK with this, but Greg feels neglectful. Christine meets a guy who is more of a slacker than Jimmy.
While cleaning, Greg finds a wedding invitation in an old jacket that he was supposed to mail. Kim's friendship ended when she never responded to the (unreceived) invitation. Christine spends more time studying for college than with Jimmy.
Kim and Greg go to Greg's parents for Thanksgiving. Jimmy invites his parents to his place for Thanksgiving who also brings aunt, grandmother and a cousin who has been in prison. Things go downhill from here for Jimmy & Christine.
Jimmy & Christine give Greg & Kim a gift of a trip to the grand canyon. The Hughes also go on the vacation, and the trip is in an old RV. Christine makes the Warner's leave them money at home, so when the RV breaks, the trip is stalled.
Greg's parents and Kim's parents visit for Christmas. The idea of "A and B grandparents" is introduced causing Greg to force his parents to spend more time with Sam so that they will not become the "B" grandparents.