[s9e1] Know This, We've Noticed Access

: After his diner burns down, Dan returns to Tree Hill seeking a place to stay. Although hesitant due to his dark history, Haley eventually allows him to stay for a few days, leading to a tense confrontation when Nathan returns home to find Dan holding his daughter, Lydia.

: Clay begins experiencing strange episodes of sleepwalking, once waking up in a park with no memory of how he got there. Despite Quinn’s pleas for him to seek medical help, he initially remains in denial. [S9E1] Know This, We've Noticed

: Brooke and Julian are adjusting to the exhaustive demands of raising their new twins, while Haley and Nathan face similar challenges with their children. : After his diner burns down, Dan returns

The episode intertwines the chaotic early days of parenthood with mysterious, looming threats: Despite Quinn’s pleas for him to seek medical

: This episode features the first on-screen appearance of Brooke’s father, Ted Davis.

: James Lafferty (Nathan) and Bethany Joy Lenz (Haley) are the only cast members to appear in every single season premiere of the show.