One Tree Hill (2003)

S4E16 You Call It Madness, But I Call It Love

On Prom night, chaos unfolds as Lucas uncovers the identity of the mysterious figure in the hallway during Keith's murder. Meanwhile, the deranged Derek has taken Peyton captive in her own home. As the evening progresses, Haley and Nathan promise to keep the romance alive between them, while Dan persists in his efforts to charm Karen.