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 Allison Doren Actor Carl Lumbly Marcus Dixon Actor Kevin Weisman Marshall Flinkman Actor David Anders Julian Sark Actor David Carradine Conrad Guest Star Patricia Wettig Dr. Judy Barnett Guest Star Amanda Foreman Carrie Bowman Guest Star Jonathan Banks Frederick Brandon Guest Star Jimmie F. Skaggs Captain Guest Star Danny Trejo Emilio Vargas Guest Star Gary Carlos Cervantes Panamanian Detective Guest Star Allen Evangelista Jandu Guest Star Ryan Honey Delta Force Leader Guest Star James Carraway Proteo Di Regno Guest Star J.J. Abrams Executive Producer John Eisendrath Executive Producer Ken Olin Executive Producer Jeff Pinkner Writer Lawrence Trilling Director