Episode: 5×11 (Season 5 Episode 11)
Name: You’re Gonna Need Someone On Your Side
Originally Aired: Mar. 11, 2008

Plot: The night before Lucas’ wedding to Lindsey, Lucas and Lindsey work to save Nathan and Haley’s marriage while Brooke sets Peyton up with a date to the wedding — a surprise old boyfriend. Rachel returns to Tree Hill to find the same challenges while Dan also returns, hoping to make a clean start.