The second season of The New Adventures of Old Christine premiered on CBS on Monday nights from 9:30/8:30/8:00 pm from September 18, 2006 and concluded on May 7, 2007. It consisted of 22 episodes.
In this season, due to Richard and Christine's brief kiss, Richie believes that his parents have gotten back together much to his parents' dismay. Christine starts dating an older man who she later discovers is New Christine's father, this situation causes Richard and New Christine to rekindle their romance once again. Barb decides to start working at the gym with Christine, while Christine falls hard for Richie's new teacher, Mr. Harris. The season finale included Richard sleeping with Christine after breaking up with New Christine yet again. This causes a pregnancy scare for Christine which is soon avoided. Eventually, New Christine takes Richard back and Mr. Harris takes a new teaching job at another school to be with Christine.
Since New Christine broke up with Richard, he's been spending a lot of time at Old Christine's house, leading Ritchie to believe that his parents are back together. When Christine tells Richard that Ritchie told this to his new teacher, Mr. Harris (Blair Underwood), Richard suggests that they give their relationship another try.
Richard tells Christine that the reason he has good luck with women is that he "says yes to life." When Christine meets a good-looking man (special guest star Scott Bakula) after paying a surprise visit to New Christine, she decides to break out of her mold and says yes when he asks her out to dinner.
Christine tries to determine whether it is ethical to date Jeff. Christine is later horrified when she's convinced to take New Christine's father as Ritchie's grandfather to 'Grandparents Day'.
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.
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.
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.
Christine has money problems and tries to get help from everyone except the person offering it freely: Barb. Meanwhile, Matthew gets a video message from his past and decides it's time to make something of himself.
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's Prius is damaged in an accident with Marly's Hummer and they argue over who is responsible, but Christine is more upset when the only rental car available is a large, luxury gas-guzzler.
Mr. Harris suggests that Ritchie join the soccer team to improve his social skills and make friends. Christine is against the idea, but Richard is all for it until Ritchie brings home his new friends: three girls. Meanwhile Christine and Richard compete for Mr. Harris' attention.
Richard tries to make Ritchie take an interest in his work, while Christine attempts to take an interest in her brother's life. She attends a party with him, where she runs into one of Matthew's former girlfriends and tries to help get them back together, even though he asked her not to.
After helping New Christine to come up with an idea for Richard's birthday present, Christine takes credit for this idea herself. As payback New Christine bakes her own cake knowing that it was Christine's tradition to do so.
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15
"Sleepless in Mar Vista"
Andy Ackerman
Story by : Allan Rice Teleplay by : Danielle Evenson
Richard is shocked to learn of Matt and Barb's short fling in the past, and must share an embarrassing secret with them. Christine becomes obsessed with becoming politically active to set a good example for Richie.
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18
"The Real Thing"
Andy Ackerman
Story by : Charles Zucker Teleplay by : Jeff Astrof & Danielle Evenson
Christine almost gets Mr. Harris fired after unintentionally sending all the parents at Ritchie's school an email revealing that their parent/teacher relationship may be something more. While Christine and Mr. Harris are being reprimanded by the head of the school ethics committee, Christine gets some surprising news from Mr. Harris.
When Christine learns that Richard has been hired to remodel "meanie mom" Lindsay's bathroom, she can't help but intervene and 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.
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.