After Richie begins showing more interest in spending time with Richard and then does a bad job on his school homework project, Christine contemplates bailing Richie out in an attempt to win him over again.

Christine can't help but meddle in Matthew's love life when she meets his ex-girlfriend at a party. Meanwhile, Richard hopes to get Ritchie enthused about his contracting job.

Christine vows to become more aware of politics when Richard scolds her about her indifference towards an upcoming election setting a bad example for Ritchie.

When Christine learns that Richard has been hired to remodel "meanie mom" Lindsay's bathroom, she can't help but intervene to make sure he doesn't screw up the job and risk their reputation at Ritchie's school. Additionally, she and Richard are at odds over which of them gets to be the one to give Ritchie the sex talk.

Christine tries to make a good impression at the Parents Orientation. However, her behavior is anything but good when she recognizes one of the fathers as the boy she knew in junior high.

With Barb and Mathew moving out and Ritchie leaving for science camp, Christine wants to prove she can take care of herself.

When Christine's environmentally-friendly hybrid car and Marly's gas-guzzling monster SUV hit one another, it becomes a bigger dispute than simply who hit whom. While her car is in the shop, Christine is forced to go against her principles and rent a luxury SUV when no other car is available.

Jealous that New Christine benefits from all the positive qualities she instilled in Richard during their marriage, Christine spites her by revealing to Richard that she gave New Christine the idea for the birthday gift she gave him.

On their way to Ritchie's desert camping trip, Christine, Richard, Matthew, and Barb stay at a seedy motel and get on each others' nerves.

Roles reverse when Christine's dubbed a "meanie mom" by a father at Ritchie's school who finds Marly and Lindsay to be to his liking.

Christine and Richard have a dinner date with her new boyfriend, Patrick, (Tim DeKay a.k.a. Bizarro Jerry on "Seinfeld") returns as her date.

New Christine loosens up during a bachelorette party Christine and Barb throw in Vegas.

Ritchie goes to church with Richard and new Christine without consulting his mother first, leaving old Christine to explain and explore her aversion to organized religion.

Christine has trouble working with Barb at the gym and feels pressure at home to find a nanny for Ritchie when Richard is unavailable to care for him due to a trip with New Christine.

Richard want Ritchie to learn the value of competition and male bonding, and signs him up for soccer. Christine disagrees, but then has her own competitive urges when fighting with Richard for attention from Mr. Harris.

Christine finds out Richard's brother is gay, but not until after sleeping with him.

Christine finds out her new sleep medication caused her to embarrass herself over the phone.

Trying to send an e-mail to Barb about Mr. Harris, Christine ends up sending it to all the parents from school, nearly costing him his job.

Barb's profile in a business journal brings in new clientele.

Christine is distraught when Ritchie stops saying "I love you" to her. When she reveals her distress to Matthew, she also admits that she's been sleeping in Ritchie's room every night. Matthew tells her that if she's not careful, Ritchie will end up like him -- he can't go to sleep without talking to their mother. They spend the night helping each other break these habits.

The girls change their building into a spa after learning that they can't get a loan to keep their gym afloat.

Barb, afraid that a marriage proposal is iminent, asks Christine to run interference on her next date with Dave; Richard realizes he must try to woo New Christine if he wants her back.

Christine realizes that Ritchie has never been on a real family vacation, so she plans a trip to Florida, with disastrous results.

Christine tries not to have a meltdown when her ex-husband, Richard, brings his "new" Christine with him to pick up Ritchie and take him to breakfast so that they can get to know one another. By day's end, Christine tries to pull herself together to make a good impression at parents' night at Ritchie's school, but is caught off guard when "new" Christine shows up as well.

Barb moves in with Christine after deciding to divorce her husband. This forces Matthew into Ritchie's room, where he discovers his nephew has some odd habits.