Eastern/Central Time:

MARISSA AND RYAN GET PHYSICAL AT HARBOR'S KICK-OFF CARNIVAL ON "THE O.C." THURSDAY, SEPTEMBER 15, ON FOX

Eric Mabius and Autumn Reeser Join the Cast as Guest-Stars

Chaos reigns in the Cohen kitchen as Sandy, Ryan and Seth continue to cope with Kirsten's rehab. When Sandy encourages Kirsten to come home to her family, Kirsten's attachment to Charlotte causes Sandy to become concerned. Meanwhile, at Harbor School, Dean Hess, the new Dean of Discipline, arrives and makes a decision that changes Marissa's life forever, and Summer trumps Taylor Townsend, her cardigan-wearing, goody two-shoes newpsie nemesis, when planning the annual Kick-Off Carnival. Meanwhile, Jimmy offers Julie a surprising proposal on "The Shape of Things to Come" episode of THE O.C Thursday, Sept. 15 (8:00-9:00 PM ET) on FOX. (OC-302) (TV-PG L, 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, Rosalyn Chao as Dr. Kim, and Blake Robbins as Don

Pacific Time:

MARISSA AND RYAN GET PHYSICAL AT HARBOR'S KICK-OFF CARNIVAL ON "THE O.C." THURSDAY, SEPTEMBER 15, ON FOX

Eric Mabius and Autumn Reeser Join the Cast as Guest-Stars

Chaos reigns in the Cohen kitchen as Sandy, Ryan and Seth continue to cope with Kirsten's rehab. When Sandy encourages Kirsten to come home to her family, Kirsten's attachment to Charlotte causes Sandy to become concerned. Meanwhile, at Harbor School, Dean Hess, the new Dean of Discipline, arrives and makes a decision that changes Marissa's life forever, and Summer trumps Taylor Townsend, her cardigan-wearing, goody two-shoes newpsie nemesis, when planning the annual Kick-Off Carnival. Meanwhile, Jimmy offers Julie a surprising proposal on "The Shape of Things to Come" episode of THE O.C Thursday, Sept. 15 (8:00-9:00 PM PT) on FOX. (OC-302) (TV-PG L, 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, Rosalyn Chao as Dr. Kim, and Blake Robbins as Don

Mountain Time:

MARISSA AND RYAN GET PHYSICAL AT HARBOR'S KICK-OFF CARNIVAL ON "THE O.C." THURSDAY, SEPTEMBER 15, ON FOX

Eric Mabius and Autumn Reeser Join the Cast as Guest-Stars

Chaos reigns in the Cohen kitchen as Sandy, Ryan and Seth continue to cope with Kirsten's rehab. When Sandy encourages Kirsten to come home to her family, Kirsten's attachment to Charlotte causes Sandy to become concerned. Meanwhile, at Harbor School, Dean Hess, the new Dean of Discipline, arrives and makes a decision that changes Marissa's life forever, and Summer trumps Taylor Townsend, her cardigan-wearing, goody two-shoes newpsie nemesis, when planning the annual Kick-Off Carnival. Meanwhile, Jimmy offers Julie a surprising proposal on "The Shape of Things to Come" episode of THE O.C Thursday, Sept. 15 (Approx. 7:30-8:30 PM MT) on FOX. (OC-302) (TV-PG L, 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, Rosalyn Chao as Dr. Kim, and Blake Robbins as Don

[EDITOR'S NOTES: If FOX News fills to 8:00 PM MT, THE O.C. will start at 8:00 PM MT and no other show will air; the News cutoff will be 7:42 PM in MT � thus, primetime in MT could run until 9:12 PM.]