The fourth season of The New Adventures of Old Christine premiered on CBS on Wednesday nights at 8:00pm on September 24, 2008 and concluded on May 20, 2009.

Richard and New Christine become engaged while Matthew finds love with one of his clients.

Christine has a brief relationship with an obsessive man named Patrick, while she and Barb decide to turn their gym into a spa which they later shockingly discover has turned into a brothel.

When she reveals her distress to Matthew, she also admits that she's been sleeping in Ritchie's room every night.

Matthew tells her that if she's not careful, Ritchie will end up like him -- he can't go to sleep without talking to their mother.