He ends up skipping his interview with a Brown University scout. Seth starts to smoke marijuana, which was supplied by Kaitlin, to relieve college pressures.She decides to leave after her classmate starts a new relationship with her during Valentine's Day. She is more rebellious and devious than before it is revealed that she stole money to go back home, smokes marijuana, and sparked more trouble in the Ryan-Marissa-Johnny love triangle. The return of Kaitlin Cooper from boarding school for the holidays.Seth, Ryan, Summer and Marissa applying for college Seth and Summer to Brown, Ryan and Marissa to University of California, Berkeley.Sandy taking over control of the Newport Group, and hiring newcomer Matt Ramsey to help run it.Julie eventually abandons her motel room for a trailer park. Julie hits rock bottom as she is forced to live out of a low-rent motel room, while Marissa moves in with Summer. Julie and Marissa are evicted from the mansion.

Jimmy originally plans to marry Julie for her inheritance, but leaves after discovering that Caleb was bankrupt. Jimmy eventually fails to pay back the money and as a result, he is severely beaten by Don and his cronies. The return and then the final goodbye by Jimmy Cooper, who was deep in debt with a loanshark named Don.

The arrival and departure of Jack Hess, the new Dean of Discipline, who leaves after Summer finds out about his relationship with Taylor and blackmails him to let Ryan back in Harbor.

Later, however, she becomes a friend of Seth and Summer, when the two realize how much her mother is bad with her.

The introduction of Taylor Townsend, Summer's rival, the two of whom fight over the social chair position previously occupied by Marissa.

Julie and Kirsten starting a catering business, then later deciding to turn it into a high-end dating service.

Trey Atwood's farewell, which in the previous season, after being shot by Marissa Cooper ended up in a coma, and that after his recovery, he spontaneously decided to leave Newport Beach, get on a bus, direction Las Vegas.

Her plans to steal money from the people of Newport were thwarted by Julie Cooper.

The arrival and departure of Charlotte Morgan, a con artist who tries to manipulate Kirsten Cohen while at rehab.

After some help from her friends, Taylor and Sandy, she is readmitted by the school board.

Marissa being expelled from Harbor School for shooting Trey.

Johnny dies from head injuries sustained from a drunken fall off of a cliff. Johnny develops a love for Marissa, for helping him out when he couldn't make the surfing team.

The arrival and death of Johnny Harper, a former schoolmate of Marissa's while she was at Newport Union.

To see music featured during this season, see Season 3 Music. The third season, SeptemMay 18, 2006, contained 25 episodes and ends with the death of Marissa Cooper, one of the main characters of the series.

Watch the office season 3 episode 19