Episode: 5x12 (Season 5 Episode 12) Name: Hundred Originally Aired: Mar. 18, 2008 Plot: In the 100th episode of One Tree Hill, it's Lucas and Lindsey's wedding day and Peyton must decide whether to intervene with the ceremony or lose her soul-mate forever. Nathan uses the event to try to mend his marriage to Haley. All are shocked when Dan, who is out of prison on parole, shows up at the event.