The O.C. - Season 3 - Eps 21: The Dawn Patrol
Ryan decides to go and invite his mother to his graduation party. Taylor and Summer work together to try and find out what Seth is hiding, but Summer ends up getting hurt. Marissa realises she is in bad company after she finds out how low Volchok's friends can go. Sandy is able to fix his work problems with Matt but while doing so he hurts Kirsten.
About The O.C.

Title: The O.C.
First Air Date: 2003-08-05
Last Air Date: 2007-02-22
Status: Ended
Rating: 7.8/10 (from 852 votes)
Language: EN
Seasons: 5
Total Episodes: 92
Network: FOX
Genres: Drama
Production Companies: Warner Bros. Television, Wonderland Sound and Vision, Fake Empire Productions
Synopsis
Ryan Atwood, a teen from the wrong side of the tracks, moves in with a wealthy family willing to give him a chance. But Ryan's arrival disturbs the status quo of the affluent, privileged community of Newport Beach, California.
Cast

Peter Gallagher
Sandy Cohen

Kelly Rowan
Kirsten Cohen

Ben McKenzie
Ryan Atwood

Adam Brody
Seth Cohen

Melinda Clarke
Julie Cooper

Rachel Bilson
Summer Roberts

Autumn Reeser
Taylor Townsend

Willa Holland
Kaitlin Cooper