The O.C. Soundtrack 
Episode 18 • The Undertow
Don't Pity Me
This songs plays at Jess' Party when things get out of hand. Jess' friend Kim calls Ryan for help, interrupting his date with Sadie.
Girl and the Sea
You hear this song at the Bait Shop where Summer talks to Marissa about her love life with Seth, or lack thereof.
What If's And Maybe's
You hear this song when Jim confronts Ryan at Jess' house after he walks in on their embrace. Jim and Ryan get physical and Ryan leaves the party.
It's Just Cruel
The National Trust
This song plays as Ryan arrives at Jess' house. Jess has locked herself inside of the pool house and won't speak to anyone except Ryan.
Scissors 4 Lefty
This song plays at the beginning of the of the episode while Seth, Ryan, Summer and Sadie are hanging out at The Cohen's house playing video games.
Lover I Don't Have To Love
You first hear this song while Marissa sits on the lifeguard tower thinking about calling Volchok. It plays for a second time when Marissa calls Summer, but she doesn't answer. Again, it plays when Sadie walks out on her date with Ryan, dissapointed that he will be cutting it short to go see Jess. Finally the songs plays at the end of the episode where Seth and Summer, Ryan and Sadie, and Marissa and Volchok hook up with eachother.
We Are Scientists
This song plays while Ryan aggressively works out with a punching bag, and thinks about Trey.
C'mon, there's no such thing as a stupid question. Get the ball rolling and be the first.
Tv Show Info
Christopher Tyng, Richard Marvin