Christine and Mr. Harris try to establish a relationship before having sex, but Barb gives her pause. Matthew is horrified when he sees his med school cadaver was a neighbor.

Insecurity over a waitress flirting with Daniel sends Christine to a plastic surgeon's office.

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.

Ritchie's soccer match leaves Christine running late for an event she's supposed to be attending with Mr. Harris.

Christine tries to get over breaking up with Daniel. Matthew learns the source of his intimacy issues is not his mother, but Christine.

Christine hesitantly allows New Christine to arrange a blind date for her and finds her intuition against the idea was spot on.

Christine tries to forbid Barb and Matthew from letting a night of passion bloom into a full-blown relationship.

Christine tries to control her hormones when her gynecologist says she may be entering perimenopause.

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 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 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 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.

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.

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.

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

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.

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.

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.

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

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.

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.