Jennifer Garner Sydney Bristow Actor Victor Garber Jack Bristow Actor Ron Rifkin Arvin Sloane Actor Michael Vartan Michael Vaughn Actor Lena Olin Irina Derevko, Laura Bristow Actor Bradley Cooper Will Tippin Actor Merrin Dungey Francie Calfo Actor Carl Lumbly Marcus Dixon Actor Kevin Weisman Marshall Flinkman Actor David Anders Julian Sark Actor Terry O'Quinn F.B.I. Assistant Director Kendall Guest Star Amanda Foreman Carrie Bowman Guest Star Jonathan Banks Frederick Brandon Guest Star Greg Grunberg Eric Weiss Guest Star Kevin Bowens Alpha Team Leader Guest Star Jon Dixon C.I.A. Agent 1 Guest Star Paul Keeley Police Officer 1 Guest Star Michael Yama Chinese Agent Guest Star J.J. Abrams Executive Producer, Writer, Director John Eisendrath Executive Producer Ken Olin Executive Producer