
"Old Christine" (Julia Louis-Dreyfus) is a divorced mom who has a handle on her career and motherhood -- and a pretty good relationship with her ex-husband -- until he introduces his new girlfriend, a younger woman, also named Christine. Old Christine lives with her son and her brother, and runs a gym, and her life is a constant struggle to keep up with everyone else.

Christine tries to reignite the relationship between her brother and his ex-girlfriend; Richard tries to interest Ritchie in his job.

Christine wants credit for turning Richard into a good boyfriend and for recommending a thoughtful birthday gift for New Christine to give him.

After taking sleeping pills, Christine discovers that she made several embarrassing phone calls while knocked out.

Christine struggles over what to do when Ritchie does a poor job on an important homework assignment.