As Brooke and Haley prepare to re-open Karen’s Cafe, Nathan and Clay hit the road looking for new prospective clients. Meanwhile, Chase leaves for the Air Force leaving behind a disappointed Alex and Chuck, and Mouth and Millicent begin their new morning show together. Watch free, streaming full episodes of One Tree Hill on cwtv.com. One Tree Hill Video: Watch One Tree Hill full episodes, previews, clips, interviews and more video. One Tree Hill takes place in a small North Carolina town, where two estranged half brothers carry on very different lives.