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 Christian Slater Neil Caplan Guest Star Yvonne Farrow Diane Nixon Guest Star Lindsey Ginter Mr. Johnson Guest Star Michael Enright Antonyn Vasilly Guest Star Tracy Middendorf Elsa Caplan Guest Star Arthur Young Aaron Caplan Guest Star William Dennis Hunt Claude Sheurer Guest Star Evan Arnold David Guest Star J.J. Abrams Executive Producer John Eisendrath Executive Producer Ken Olin Executive Producer Alex Kurtzman Director, Writer Robert Orci Writer