It's Prom night, but things start to go awry. Lucas remembers that someone was in the hallway when Keith was killed. Psycho Derek holds Peyton and Brooke hostage in Peyton's own house. Haley and Nathan vow to be romantic with each other throughout the night. Dan continues to win over Karen's affections. Within Reason guest star to perform during the Prom. This episode is named after a song by Nat King Cole.