Jennifer Garner Sydney Bristow Actor Victor Garber Jack Bristow Actor Ron Rifkin Arvin Sloane Actor Michael Vartan Michael Vaughn Guest Star Carl Lumbly Marcus Dixon Actor Kevin Weisman Marshall Flinkman Actor Melissa George Lauren Reed Actor Greg Grunberg Eric Weiss Actor David Anders Julian Sark Actor Mía Maestro Nadia Santos Guest Star Isabella Rossellini Katya Derevko Guest Star Mikhail Tank Russian Guard Guest Star Ismail Kanater Contact Guest Star Ric Young Dr. Zhang Lee Guest Star Vivica A. Fox Toni Cummings Guest Star Britney Espinoza Young Nadia Guest Star Mio Dzakula Groggy Russian Guard Guest Star J.J. Abrams Executive Producer John Eisendrath Executive Producer Ken Olin Executive Producer Jesse Alexander Writer Lawrence Trilling Director