One Tree Hill:

First Day on a Brand New Planet

On the first day of senior year, estranged spouses Nathan and Haley have trouble adjusting as classmates. While Brooke continues to play hard-to-get, Lucas learns a troubling secret about Peyton's mom.

Meanwhile, Dan starts to uncover the truth about the dealership fire and lines up a list of suspects and who could have tried to kill him.

This episode is named after a song by the band Jesse James.