David DiBrienza

Summer decides to take an active role in creating the comic book, but Seth doesn't know if he can handle spending that much time alone with her. Sandy and Rebecca (recurring guest star KIM DELANEY) reminisce about days gone by as Kirsten tries to convince Caleb that he could have a familial relationship with Lindsay (recurring guest star SHANNON LUCIO). Meanwhile, Caleb decides what kind of future he wants to have with his daughters. And Alex (recurring guest star OLIVIA WILDE) asks Marissa where their friendship is going. Chicago singer/songwriter RACHEL YAMAGATA performs.

In the season finale, Sandy must make a life-changing decision to save his marriage to Kirsten. Seth, Summer, Marissa and Ryan are caught in the crossfire at The Bait Shop; and Jimmy Cooper (former series star TATE DONOVAN), worried about Marissa and his family, rushes home to Newport Beach.

Vince agrees to a starlet's pet project; Turtle misrepresents his position to get a girl; Drama develops calf-envy.