he first season of One Tree Hill, an American teen drama television series created by Mark Schwahn, began airing on September 23, 2003 on the WB television network. The season concluded on May 11, 2004, after 22 episodes.
The series premiere was watched by 2.5 million viewers and achieved a 1.9 Adults 18-49 rating on September 23, 2003. However, the following week it rose to 3.3 million viewers and a 2.4 demo, becoming only one of three shows to rise in its second episode in the 2003-2004 TV season.
Warner Home Video released the complete first season, under the title of One Tree Hill: The Complete First Season, on January 25, 2005, as a six disc boxed set.Overview from themoviedb.org