Premise: ``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.
S04, E13 (First Aired: Jan. 14, 2009)
Christine reverts to junior-high behavior when she recognizes the father of Ritchie's classmate as her former tormentor.
S04, E14 (First Aired: Jan. 21, 2009)
New Christine loses all her inhibitions at an impromptu bachelorette party Christine and Barb throw for her in Las Vegas.