Jimmy wins a fish at a carnival for Sammy. The next day it dies. Greg tells Sammy the fish is gone and they will get another one. Kim wants to explain about death and true emotions, even though he does not really seem to care.
Christine meets a woman who brags about her husband fulfilling his dream of opening a restaurant. Christine decides Jimmy should try his dream of being a baseball umpire. Kim is annoyed at an intruding neighbor who cooks and bakes for Greg.
Sammy and Logan start nursery school. The lead teacher shows preference for Sammy and ignores Logan. Christine thinks it is because Kim sends in brownies, cookies, and sandwiches. They are all surprised when they find out the real reason.
Dominic has trouble sleeping in his parent's small home, so Kim invites Dominic to sleep in her & Greg's guest bedroom. While sleeping, he sleepwalks, steals things from Greg and Kim, and beats up Greg.
Greg's first girlfriend, Stacey, from high school visits with her husband. They ask Greg to donate sperm so she can have a child. When he turns them down, they ask Jimmy. Greg reconsiders and then Greg and Jimmy compete to be the donor.
Jimmy and Dominic joins a father/son Indian scout group. Jimmy's humor does not go over well with the group, and he does not enjoy the activities. Greg used to be an Indian scout and helps Dominic. He then takes over other fatherly duties.
Christine is smoking again and tries to stop. Greg is up for a promotion against another person. Jimmy plays on Greg's company baseball team and helps to win the game; Greg gets the promotion and Jimmy thinks he helped him get it.
Kim finds out her engagement ring was one that Greg actually purchased for a former girlfriend. Greg searches for another ring to buy Kim. Jimmy buys Christine a foot bath and she enjoys it more than being with him.
Kim & Greg write their wills. If they both die, Christine & Jimmy have care of their child, but not the money. Jimmy takes exception, so Greg gives him money to see how he can manage it. There are several business ventures.
Greg's parents arrive for a visit. Greg thinks his mother bosses his father around too much, so Greg, Jimmy, and the father go to Vegas to have a carefree, dictated free weekend. Kim and Greg's mother talk about the weather and more.
Now that Sammy is 2 years old, Kim wants another baby but Greg is reluctant. He agrees only if it will be their last child. Jimmy & Christine listen to missionaries about their church who then volunteer to paint their house.
A new parent at the childcare center has a nanny who does not seem to be appreciated. Kim hires the nanny away from the parent. Kim soon finds out why the nanny is not appreciated. Logan has a new toy - a dog robot.
Kim is ordered on bed rest for a week due to her pregnancy, and Jimmy is confined to rest after he breaks his leg. Greg spends time with Christine doing chores and errands while Kim and Jimmy connect during their convalescence.
A documentary style program shows Greg & Kim preparing for the birth of their new child. The documentary goes through Greg & Kim meeting, Jimmy and Christine meeting and marrying, both sets of parents, and more. Baby Emily is born.