Lucas (Chad Michael Murray) reveals that he knows who tried to kill Dan (Paul Johansson). Brooke (Sophia Bush), Peyton (Hilarie Burton) and Haley (Bethany Joy Lenz) find themselves behind bars. Chris Keller (Tyler Hilton) convinces Nathan (James Lafferty) to be his wingman at a high-stakes poker game. The residents of Tree Hill finally choose a mayor.