When Christine has Matthew and Barb throw her a "surprise" engagement party so she can get to know Max's friends, she begins to feel intellectually inferior to one particular guest, driving her to make a "surprising" decision.

Christine and Matthew fly to the Bahamas to get Barb an illegal visa after she was arrested by immigration during Richard and New Christine's wedding ceremony.

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.

After Ritchie hurts himself at a skateboarding party, Christine accuses Richard of bad parenting, and they begin competing to prove each other wrong. Matthew gets involved in a rebound relationship.

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

In an attempt to teach Ritchie's class some street smarts, Christine encourages the school administration to let them take the subway on a field trip, but she ends up being stranded at the station when the trains leaves without her.

Over a Thanksgiving visit, the discovery of a shared secret gives Christine a way to negate one of her mother's criticisms.

Christine realizes that one reckless evening may have jeopardized her chance to begin dating Mr. Harris.

The stresses of going to a wedding with Richard and Barb are multiplied by Christine's agreeing to be designated driver, depriving her of some much-needed alcohol.

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.

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.

After the mothers at Ritchie's private school continue to take cheap shots at Christine, Christine decides to enroll him in public school.

Christine and Richard help Marly and Lindsay through labor, bring back memories of Ritchie's birth which, in turn, brings back feelings for one another.

Concerned about the uniformity of Ritchie's schoolmates, Christine takes it upon herself to help diversify the student body at his private school.

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

Richard learns from a gloating Matthew that Christine is out enjoying her fifth date with a new beau, Burton, so he does what any self-respecting ex-husband would do: he sabotages the happy couple's goodnight kiss and insults Burton with lawyer jokes. But when he tries to make it up to them by inviting Christine and Burton to dinner with him and "new" Christine, his best-laid plans go awry.

Christine volunteers to help out at Ritchie's spring carnival and while there, she runs into the mean moms -- Marly and Lindsay -- who are clucking over the attractive father of a new student at Westbridge. Christine is excited to learn that the hot dad is her ex-boyfriend, Burton, but her hopes of re-igniting their romance are shot down when she learns Burton has a new girlfriend.

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

Christine tells her therapist, Max, that she is in love with him, but his reaction is not quite what she is expecting.

Christine starts seeing a therapist who's Matthew's mentor, but they are both confused on whether they want to have a professional or romantic relationship. Richard and New Christine have trouble adapting to living under the same roof.

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.

A trip with Barb to retrieve some of Richard's things sees Matthew worry that New Christine isn't letting out her feelings over the wedding fiasco. Meanwhile, Christine and Richard meet up with some of their friends from college and are shocked to see how badly they've aged.

Christine and Barb prepare for a casual, non-relationship-seeking double date with two guys they meet at a video store, but jealousy arises when only one of them gets asked out for a second date.

When the gym suddenly begins to become profitable, Christine and Barb find themselves coming into a lot of money. Barb decides to give to charity, and Christine must make the tough decision between splurging on a designer dress or following Barb's lead.

Christine's attraction to Ritchie's teacher causes a scene at a school fund-raiser--especially after she wins a playdate with the man.

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

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.

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.

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.

Shut out once again by the cliquey, judgmental moms at Ritchie's school, Christine runs into a down-to-earth working woman, Belinda, who invites her over for a drink after work. Belinda's job, however, isn't quite the type of position Christine expected her to hold, which throws yet another wrinkle in her attempt to fit in with the other school parents.

Christine's 8-year-old son, Ritchie has been accepted into a posh private school where Christine encounters two snooty class moms, Marly and Lindsay, who can't seem to grasp the concept that Christine actually works. Her 20-something slacker brother, Matthew, lives with her, but in a pinch, also serves as Ritchie's babysitter. On the first day at Ritchie's new school, Christine is mortified to discover that her ex-husband, Richard, with whom she gets along even better than when they were married, is dating a young, nice, impossible-to-hate woman also named Christine… the "new" Christine.

Christine makes sacrifices so she can pay for Ritchie's school tuition.

Christine has been burning the candle at both ends -- working hard and trying to be a good mom. Ritchie decides he wants to join the reptile club at school and tells Christine all she needs to do is get the permission slip in on time. When Christine realizes that she's forgotten yet again, she asks the Reptile Guy (Jeffrey Tambor) to make an exception. He says the only way he'll consider is if Christine will go on a date with him. As creepy as he is, Christine is determined not to let Ritchie down, and so she complies.

Max decides it's time to tell Christine that she quits anything that gets too hard for her, which includes relationships, and he points out that is the reason he chose to be her therapist rather than her boyfriend.

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.

After 10 dates, Christine faces a critical moment in her relationship with Burton. Will she or won't she? Let him in the house, that is, to meet her son, Ritchie. She eventually relents, only to be thrown for a loop later.

Christine runs into Stan again and is unable to resist him, despite her best efforts. She asks Matthew to help keep Stan away from her, but her brother is having attraction issues of his own--his latest girlfriend refuses to leave.

Richard begs Christine for the return of her old wedding ring which was an heirloom from his mother, in hopes of giving it to new Christine when he proposes.

Christine thinks she has the perfect boyfriend, until he has a 'bizarre' reaction to her competitiveness after losing to her at tennis.

Christine has set up a date between Richard and a gorgeous, passionate woman who works out at her gym, while Tom (Richard's friend) continues trying to woo Chrisine.

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

A talent scout caught Ritchie's great school performance and he liked what he saw and offered him a audition to do a TV commercial, much to a thrilled Christine, but Richard won't approve of it and refuses to like him go.

Hoping to show she's fine with Richard and New Christine's wedding, Christine feigns being in love with Todd Watski—a ruse that proves difficult to pull off when he acts boorishly at the rehearsal dinner. Meanwhile, Matthew has an encounter with New Christine's sister, Amy.

When Christine learns that her close friends, Barb and Pete, are responsible for introducing Richard to his "new" Christine, she allows them to set her up on a blind date of her own. After a series of unsuccessful dates, she finds the possibility of love in the strangest of places. Meanwhile, Matthew takes Ritchie to swimming lessons.

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 hopes acting a bit more wild will stop Barb thinking she's uncool.

Christine discovers that Ritchie has become a bully at school and attempts to change his behaviour by changing her own ways.

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

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

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.