The O.C. - S3E18

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The Undertow

Series 3, episode 18

Originally Aired On: Thursday, 23 March 2006

When an old nemesis returns to Newport, Ryan gets caught up in helping her, causing a rift between him and Sadie. Seth and Summer are faced with a new problem that Taylor tries to solve. Meanwhile, Marissa finds herself all alone in Newport with no one to turn to, and Sandy grapples with business pressure.

Cast

Image for Peter GallagherPeter GallagherSandy Cohen
Image for Kelly RowanKelly RowanKirsten Cohen
Image for Benjamin McKenzieBenjamin McKenzieRyan Atwood
Image for Mischa BartonMischa BartonMarissa Cooper
Image for Adam BrodyAdam BrodySeth Cohen
Image for Melinda ClarkeMelinda ClarkeJulie Cooper-Nichol
Image for Rachel BilsonRachel BilsonSummer Roberts
Matt CohenJim
Shaun DukeHenry Griffin
Image for Cam GigandetCam GigandetKevin Volchok
Nikki GriffinJess Sathers
Jeff HephnerMatt Ramsey
Chris KernerFrat Guy
Angelique LittleWaitress
Stephen MarkleHenry Griffin
Nikki ReedSadie Campbell
Image for Autumn ReeserAutumn ReeserTaylor Townsend