Episode: 4x18 (Season 4 Episode 18) Name: The Runaway Found Originally Aired: May. 16, 2007 Plot: The future with Duke that Nathan thought he had lined up is at risk when his past mistakes come back to haunt both him and Haley. Lucas hears a shocking confession after meeting the mysterious witness to Keith's death. Meanwhile, Brooke tries to make things right with her friendship with Peyton after having a run-in with Chase.