TRAGIC NEWS HANGS OVER VALENTINE'S DAY ON "THE O.C." THURSDAY, FEBRUARY 9, ON FOX

Nikki Reed Joins Cast

Tragic news forces the gang to sort out their problems and face the reality of the situation. After Sadie arrives in Newport, Ryan helps her move and get rid of Volchok, causing Ryan to question his and Marissa's relationship. Meanwhile, Kaitlin's winter break is over - just as she gets close to her family, she once again has to say goodbye. Will she ever return to the O.C.? And in the wake of Newport's latest events, Kirsten and Julie press on with their Valentine's Day party on "The Heavy Lifting" episode of THE O.C. airing Thursday, Feb. 9 (9:00-10:00 PM ET/PT) on FOX. (OC-315) (TV-PG L)

Cast: Peter Gallagher as Sandy Cohen, Benjamin McKenzie as Ryan Atwood, Adam Brody as Seth Cohen, Melinda Clarke as Julie Cooper, Mischa Barton as Marissa Cooper, Kelly Rowan as Kirsten Cohen, and Rachel Bilson as Summer Roberts.

Guest Cast: Willa Holland as Kaitlin Cooper; Michael Nouri as Dr. Roberts, Jeff Hephner as Matt Ramsey, Johnny Lewis as Chili, Nikki Reed as Sadie, Lisa Rotondi as Gwen, Jackson Rathbone as Justin, Morena Baccarin as Leah Griffin, and Cam Gigandet as Volchok.