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 Greg Grunberg Eric Weiss Guest Star James Lesure Chris Blair Guest Star Yvonne Farrow Diane Nixon Guest Star Michael Yavnieli Driver Guest Star Kevin Sutherland Agent Blake Guest Star Ira Heiden C.I.A. Techie Rick McCarthy Guest Star Alex Morris Homeless Vet Guest Star Patricia Wettig Dr. Judy Barnett Guest Star Joel Guggenheim Agent on Call Guest Star J.J. Abrams Executive Producer, Writer John Eisendrath Executive Producer, Writer Ken Olin Executive Producer, Director Alex Kurtzman Writer Robert Orci Writer Crystal Nix Hines Writer Jesse Alexander Writer Jeff Pinkner Writer Roberto Orci Writer Lawrence Trilling Director Craig Zisk Director Guy Bee Director Erica Messer Writer Jack Bender Director Nelson McCormick Director Perry Lang Director Dan Attias Director