Episode: 2x12 (Season 2 Episode 12)
Name: Between Order and Randomness
Originally Aired: Feb. 01, 2005
Plot: Nathan decides to tell Haley the truth about his past with Taylor, but Haley chooses to keep seeing Chris without telling Nathan. Lucas and Karen fight over Lucas' refusal to take the HCM test. Meanwhile, Keith proposes to Jules and Brooke fights for better working conditions at her first job.