Peter Gallagher Sandy Cohen Actor Ben McKenzie Ryan Atwood Actor Kelly Rowan Kirsten Cohen Actor Adam Brody Seth Cohen Actor Mischa Barton Actor Rachel Bilson Summer Roberts Actor Melinda Clarke Julie Cooper Actor Alan Dale Actor Billy Campbell Guest Star Johnny Messner Guest Star Michael Cassidy Guest Star Logan Marshall-Green Guest Star Nikki Griffin Guest Star Aya Sumika Guest Star Marguerite Moreau Guest Star Travis Van Winkle Guest Star Gary Hershberger Guest Star Grant Thompson Guest Star Catherine Kresge Guest Star Death Cab for Cutie Guest Star Nathan Peterson Guest Star Jennifer Elizabeth Guest Star David Paluck Guest Star Alexandra Ryan Guest Star Graham Sibley Guest Star Caitlin Kazepis Guest Star Eric McIntire Guest Star Brandon Michael Vayda Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer Tony Wharmby Director Mike Kelley Writer