Season 9
In the last season of the series, Julian Baker and Brooke Davis juggle parenthood to their two sons and their very young careers. Haley James Scott adapts to life with a second child, an increasingly independent Jamie, a busy café to run, and a husband travelling more for work. Clay Evans, Nathan's friend and business partner, found love and happiness with Quinn James. Is a wedding in store for the couple? Or Mouth and Millicent? And what's to become of Alex Dupré and Chase and their burgeoning romance?
Episodes
1 Know This, We've Noticed Jan 11, 2012 
2 In the Room Where You Sleep Jan 18, 2012 
3 Love the Way You Lie Jan 25, 2012 
4 Don't You Want to Share the Guilt? Feb 1, 2012 
5 The Killing Moon Feb 8, 2012 
6 Catastrophe and the Cure Feb 15, 2012 
7 Last Known Surroundings Feb 22, 2012 
8 A Rush of Blood to the Head Feb 29, 2012 
9 Every Breath Is a Bomb Mar 7, 2012 
10 Hardcore Will Never Die, But You Will Mar 14, 2012 
11 Danny Boy Mar 21, 2012 
12 Anyone Who Had a Heart Mar 28, 2012 
13 One Tree Hill Apr 4, 2012