all i know is haley wasn't haley it was reagan a different character and this is the synopsis of that epi:
The unaired Pilot takes place in the past. It tells the story of Karen and Dan and how she got pregnant. Then, after Dan marries Deb it goes into the future further where Lucas has his first day at Tree Hill High. He meets Mouth and others and realizes that maybe basketball is for him. That is, until him and Nathan get into a fight about Dan. This is where it all begins.


if anyone has any clips or knows where i can watch the episode please tell me! :D XD