One Tree Hill will air its 100th episode next Tuesday, March 18. It includes a major twist at the end for Lucas and Nathan.

On the very special 100th episode of “One Tree Hill,” it’s Lucas (Chad Michael Murray) and Lindsey’s (guest star Michaela McManus) wedding day and Peyton (Hilarie Burton) must choose whether to intervene or lose her true love forever.

Nathan (James Lafferty) uses the occasion to attempt a reconciliation with Haley (Bethany Joy Galeotti), and the recently paroled Dan (guest star Paul Johansson) shows up for the family reunion.

-One Tree Hill Pictures