Jennifer Garner Sydney Bristow Actor Victor Garber Jack Bristow Actor Ron Rifkin Arvin Sloane Actor Michael Vartan Michael Vaughn Actor Carl Lumbly Marcus Dixon Actor Kevin Weisman Marshall Flinkman Actor Greg Grunberg Eric Weiss Actor Mía Maestro Nadia Santos Actor Rick Yune Kazu Tamazaki Guest Star Dennis Di Angelo Jorge Guest Star Jay Harik Lebeque Guest Star JR Reed Lead CIA Agent Guest Star Mark Ryan Cooney Guest Star Clive Pearson Guard 1 Guest Star J.J. Abrams Executive Producer, Writer John Eisendrath Executive Producer Ken Olin Executive Producer, Director Jeff Melvoin Writer