The New Adventures of Old Christine - Season 1 - Eps 1: Pilot
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.
About The New Adventures of Old Christine

Title: The New Adventures of Old Christine
First Air Date: 2006-03-13
Last Air Date: 2010-05-12
Status: Canceled
Rating: 6.944/10 (from 90 votes)
Language: EN
Seasons: 6
Total Episodes: 88
Network: CBS
Genres: Comedy
Production Companies: Kari's Logo Here, Warner Bros. Television
Synopsis
Single working mom Christine Campbell has just learned that her ex is dating a much younger woman with the same first name. To avoid any confusion, the new girlfriend is dubbed New Christine, which leaves her with the unfortunate nickname Old Christine.
Cast

Julia Louis-Dreyfus
'Old' Christine Campbell

Clark Gregg
Richard Campbell

Hamish Linklater
Matthew Kimble

Trevor Gagnon
Ritchie Campbell

Emily Rutherfurd
'New' Christine Hunter

Tricia O'Kelley
Marly Ehrhardt

Alex Kapp
Lindsay

Wanda Sykes
Barb Baran