After 200 episodes and over nine years on air, drama series One Tree Hill is set to bid goodbye to its fans as ETC premieres the shows final season this May. Making the successful shift from a teen drama to an adult drama, viewers have grown up with the show during its long run on air. Following each beloved character through new hopes, challenges and dangers; One Tree Hill looks at how we all strive to have love, laughter, health, friends, career and family in our lives. One Tree Hill Season 9 debuts on May 31, Thursday at 9PM on ETC.