| Season Number: | 4 |
| Bgcolour: |
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| Image Upright: | 0.9 |
| Num Episodes: | 22 |
| Network: | CBS |
| Episode List: | List of The New Adventures of Old Christine episodes |
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. It consisted of 22 episodes.
In this season, as Barb is divorced she is facing deportation from the U.S. so Christine decides to marry her in a sham lesbian marriage in order to keep her best friend in the country. 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. On the day of Richard and New Christine's wedding, Christine briefly gets back together with New Christine's father, but is later left heart broken when she discovers that he is engaged. This causes Richard to rush to Christine's side leaving New Christine angry and jealous causing her to leave him at the altar. Meanwhile, Barb and Christine's sham marriage is discovered by an INS officer leaving Barb imprisoned.
See main article: List of The New Adventures of Old Christine episodes.
| No. | Title | Air Date | Rating/Share (18–49) | Viewers (millions) | |
|---|---|---|---|---|---|
| 1 | A Decent Proposal | September 24, 2008 | 2.1/6 | 6.52 | |
| 2 | How I Hate Your Mother | October 1, 2008 | 2.0/6 | 6.80 | |
| 3 | White Like Me | October 8, 2008 | 2.2/7 | 7.53 | |
| 4 | Snakes on a Date | October 15, 2008 | 2.2/6 | 7.61 | |
| 5 | Everyone Says I Love You Except Ritchie | October 22, 2008 | 2.4/7 | 7.76 | |
| 6 | Tie Me Up, Don't Tie Me Down | October 29, 2008 | 7.61 | ||
| 7 | So You Think You Can Date | November 5, 2008 | 6.50 | ||
| 8 | Self-Esteem Tempura | November 12, 2008 | 6.82 | ||
| 9 | Rage Against the Christine | November 19, 2008 | 2.4/7 | 7.85 | |
| 10 | Guess Who's Not Coming to Dinner | November 26, 2008 | 7.48 | ||
| 11 | Unidentified Funk | December 10, 2008 | 2.2/7 | 7.94 | |
| 12 | Happy Endings | December 17, 2008 | 2.0/6 | 7.29 | |
| 13 | Notes on a 7th Grade Scandal | January 14, 2009 | 1.9/5 | 7.18 | |
| 14 | What Happens in Vegas is Disgusting in Vegas | January 21, 2009 | 2.1/6 | 7.29 | |
| 15 | Reckless Abandonment | February 11, 2009 | 6.67 | ||
| 16 | Honey, I Ran Over the Kid | February 18, 2009 | 1.8/5 | 6.72 | |
| 17 | Too Close for Christine | March 11, 2009 | 2.1/6 | 7.46 | |
| 18 | A Change of Heart/Pants | March 18, 2009 | 2.1/7 | 7.21 | |
| 19 | Hair | April 8, 2009 | 7.17 | ||
| 20 | He Ain't Heavy | May 6, 2009 | 1.9/6 | 6.45 | |
| 21 | The Old Maid of Honor | May 13, 2009 | 2.0/6 | 6.50 | |
| 22 | Love: A Cautionary Tale | May 20, 2009 | 1.6/5 | 5.55 |