Episode: 1x21 (Season 1 Episode 21) Name: The Leaving Song Originally Aired: May. 04, 2004 Plot: Dan is named temporary head coach of the basketball team when Whitey has to have surgery on his eyes, but no one thinks it's a good idea except Dan himself. Haley finds questionable material on Nathan's laptop, leading Haley to pull away from Nathan and leading Nathan to realize that he's inadvertently pressuring Haley into having sex with him. Meanwhile, after a mishap at the mall involving Nicki and Jenny, Jake becomes upset at Peyton and Brooke. Elsewhere, Keith tells Karen that he's leaving Tree Hill, Dan finally agrees to a divorce, and Lucas struggles in making a difficult decision.