Marissa's father Jimmy, a financial stockbroker, begins having problems with his business and tries to get out of the hole he's in to keep his narcissistic, gold-digging wife, Julie, from finding out.12 August 2003When his mother disappears and faced with the prospect of life in a group home, Ryan decides to run away from Newport, but Seth and Marissa convince him to stay and hide in a vacant building project.Meanwhile, Sandy accepts a case at his new job, a case that will test his relationship with Kirsten and her father Caleb.

Meanwhile, Luke approaches Marissa and tells her that he wants a second chance with her, much to Ryan's disappointment.

Also, Summer makes the moves on Seth, who wonders if her feelings are real or if she just using him.

Ryan forms a bond with Marissa Cooper, a friendly, but similarly emotionally troubled teenage girl living next door who introduces Ryan to the world of beach parties and life of the idle rich in Newport Beach.

But Ryan's feelings for Marissia are hampered by Marissa's egotistical jock boyfriend, Luke Ward, whom takes an instant dislike to Ryan.

Also, Julie reveals a long-held secret to Kirsten about her past.

9 September 2003Kirsten's uptight father, Caleb Nichol, comes for a visit along with his new girlfriend, Gabrielle, a 24-year-old model.

Seth as eyes for the new girl in town, Anna Stern, but becomes torn over his feelings for Summer Roberts, the outgoing socialite he's had a crush on for years.

Meanwhile, Sandy becomes upset over Kristen's loan to Jimmy for his financial problems which finally come to light at the ball when one business client decks him in the face after learning that Jimmy lost all of their money.

Seth takes matters into his own hands involving getting to like Summer, but gets taken in with Anna whom also develops feelings for him too.