The fifth season of One Tree Hill, an American television series, began on January 8, 2008. This is the second season to air on The CW television network. Season five regular cast members include Chad Michael Murray, James Lafferty, Hilarie Burton, Bethany Joy Galeotti, Sophia Bush, Paul Johansson, Lee Norris, Antwon Tanner, and Jackson Brundage. Season five is set four years into the future from the season 4 finale, and after the main characters have graduated from college.
Production for this season of One Tree Hill, along with production for all other American scripted television shows, was caught in the middle of a contract dispute between the Writers Guild of America, East, Writers Guild of America, west and the Alliance of Motion Picture and Television Producers. The dispute led to a strike by the writers, which has caused a lack in episodes being produced. The season was to conclude in June 2008, after twenty-two episodes, but the season had been shortened to twelve episodes due to the 2007–2008 Writers Guild of America strike. With the strike resolved, the CW announced that six more episodes would be produced bringing the episode count to eighteen.