Which actress was added to the main cast of "The O.C." on the 13th episode and starred in the action film "Jumper" ?
Anna Stern:  After a successful run, Melinda Clarke and Rachel Bilson were added to the main cast in the thirteenth episode, while Samaire Armstrong wasn't despite the regular appearance of her character. Rachel Bilson:  Born to a California show business family, Bilson made her television debut in 2003, and then landed the role of Summer Roberts on the prime-time drama series "The O.C." Bilson made her movie debut in "The Last Kiss" (2006) and starred in the science-fiction-action film "Jumper" (2008).
Rachel Bilson