PA: Due to some violent content, parental discretion is advised.

CALEB'S WILL IS READ ON "THE O.C." THURSDAY, SEPTEMBER 22, ON FOX

Even though they are finally happy with each other, Marissa and Ryan are forced to stay apart by their parents, Sandy and Julie. Meanwhile, Dean Hess pressures Seth and Summer into showing Harbor school spirit, which leads them to come up with a covert plan to bring Marissa and Ryan together. When Summer and Seth's plan works, Marissa and Ryan have a night to remember and Seth and Summer get busted by Taylor. Meanwhile, Caleb's will is read, leaving Julie stunned and Jimmy washed up on "The End of Innocence" episode of THE O.C Thursday, Sept. 22 (8:00-9:00 PM ET/PT) on FOX. (OC-303) (TV-14 L, S, V)

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

Guest Cast: Tate Donovan as Jimmy Cooper, Jeri Ryan as Charlotte Morgan, Eric Mabius as Dean Hess, Autumn Reeser as Taylor, Michael Adler as Jeff Frenkel, and Blake Robbins as Don