Daphne Ashbrook

Gibbs questions Vance's motives when he is asked to interrogate a teenage boy accused of killing his retired Marine father. Also available on iTunes and VUDU

Melinda reunites with some of her former high school classmates after one of the group dies unexpectedly.

The end of senior year is finally here, bringing the excitement of graduation and the anticipation of new lives in college and beyond. But for Seth, Ryan, Marissa and Summer, it's also a time to look back on the amazing journey that has brought the four of them this far. Seth must confront his recent misdeeds or deal with the wrath of Sandy--and the police. Ryan's proud mom arrives with a surprise for him. Marissa receives an astounding proposal that may radically change her plans. And Summer, facing the prospect of going away without Seth, can't stop crying and hugging her best friends as they say their farewells. Kaitlin (recurring guest star WILLA HOLLAND) returns and moves into Julie's home, vowing to become the next Cooper to rule Harbor High. And to Taylor's (recurring guest star AUTUMN REESER) joy, the 'core four' turns into the 'fab five.' However, although the kids may be ready to move on to bright futures, unresolved issues from their past could ruin everything. Also available on iTunes

Ryan leaves Newport to visit his mom, but before they meet, he has a steamy encounter with her co-worker. Meanwhile, Seth is keeping secrets, and Taylor (recurring guest star AUTUMN REESER) and Summer devise a foolproof plan to figure out what's going on with him. When their plan backfires, Summer is devastated. Julie Cooper visits a surprised Volchok (recurring guest star CAM GIGANDET) and gives him some stern advice. Later, Marissa confronts Volchok's friends and saves a girl from an intense situation at a raging party. Meanwhile, Sandy puts an end to the trouble with Matt (recurring guest star JEFF HEPHNER) but leaves Kirsten at home alone. Also available on iTunes