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 Jeri Ryan Guest Star Tate Donovan Guest Star Logan Marshall-Green Guest Star Timothy Omundson Guest Star Garrett M. Brown Guest Star Michael Adler Guest Star Stephen O'Mahoney Guest Star Gary Weeks Guest Star Michael Canaan Guest Star Ray Laska Guest Star Lily Rains Guest Star J.J. Boone Guest Star Sean Blakemore Guest Star Rigo Sanchez Guest Star Kathleen Marie Carr Guest Star Josh Schwartz Executive Producer Doug Liman Executive Producer McG Executive Producer David Bartis Executive Producer Robert DeLaurentiis Executive Producer Ian Toynton Director