Carrie is reluctant to tell Aidan that she had an abortion when she was 22. Charlotte discovers she only has a fifteen percent chance of getting pregnant naturally. Miranda finds out she's pregnant by Steve, and debates whether or not to keep the baby. Samantha gets Lucy Liu as a client and tries to use the relationship to her advantage.

Aidan proposes to Carrie. Charlotte discusses adoption with Trey, but hits a wall when Bunny finds out that the baby could be Chinese. Miranda tells Steve she's having his baby. Samantha starts sleeping with her boss, Richard Wright.

After Berger flips out and flips off his ex-girlfriend's answer-phone message, Carrie tries to not think about her influence on his life. Miranda finds condoms in Brady's diaper bag and gets upset with Steve. Newly converted Charlotte mourns the loss of Christmas. An on-the-job quickie with Samantha gets Smith fired from a catering gig.

Carrie feels bad for criticizing a minor point in Berger's book. When Berger teaches Miranda how to tell that a guy is "not that into her", she feels the need to spread the word to other women. Charlotte cooks her first Shabbat dinner for Harry. Samantha and Jerry act out all their sexual fantasies.

Carrie shows strange signs of distress when Big needs heart surgery. Miranda gets close to her new boyfriend Robert, but is reluctant to introduce him to Steve. Reproductively-challenged Charlotte tries acupuncture in order to get pregnant. Samantha refuses to hold hands with Smith.

Carrie meets fifty-something Russian artist, Aleksandr Petrovsky (Mikhail Baryshnikov), at a gallery. Miranda's boyfriend Robert says "I love you" but she cannot say it back. Charlotte is delighted to discover she's pregnant — then devastated when she miscarries. After finding one gray hair down under, Samantha dyes her pubic hair with shocking results.