The 秒 season consisted of 23 episodes and ran from September 21, 2004 to May 24, 2005.
After Lucas and Keith learn of Dan's 心 attack, they return to 树 爬坡道, 小山 and Dan decides he wants to get to know Lucas. Lucas cautiously enters into a relationship with his father. After Dan learns that Lucas has inherited his hypertrophic cardiomyopathy (HCM), the genetic defect which caused Dan's own 心 attack, he convinces Lucas to 移动 in with him and pays for his medication, keeping his condition a secret. Dan also agrees to stay away from Keith and his girlfriend Jules (guest star, Maria Menounos)...
Haley: 你 can work your whole "I'm Nathan Scott, Mr. Big Shot, scoring my touchdowns" on somebody else because- Nathan: I don't even play football. Haley: Whatever. The point is at the end of the 日 all your bluster and BS don't mean anything to Math. 'Cause Math don't care and neither do I. Nathan: Well does English care? 'Cause I really suck at that too.
Nathan: Don't say I never gave 你 anything.
Haley: I'm really fine. Nathan: Little high on yourself aren't you? Going around saying you're all fine?
Nathan: What are you, my tutor 或者 my shrink? Haley: Whatever 你 need.
The fourth season consisted of 21 episodes and ran from September 27, 2006 to June 13, 2007.
As the end of High School approaches, everyone finds themselves at a crossroads in their lives. Nathan survives the accident and after some initial confusion, Haley is revealed to be pregnant while Rachel turns her attentions to Nathan after Cooper leaves town, using Nathan's theory that it was really Keith who saved him from the accident to get Nathan's attention. Rachel backs off when she learns that Haley is pregnant and Nathan later learns that he had a vision of Keith and it was this vision that...