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 Greg Grunberg Eric Weiss Guest Star Derrick O'Connor Alexander Khasinau Guest Star Stuart Yee The Tester Guest Star Jamie McShane C.I.A. Agent Guest Star Clayton Landey C.I.A. Officer Wilcox Guest Star Danny Romero Reporter 1 Guest Star Chris Harrison Reporter 2 Guest Star Tricia Nickell Reporte 3 Guest Star Roger Lim Taiwanese Gasping Body Guest Star Todd Karli Newscaster Guest Star Patricia Wettig Dr. Judy Barnett Guest Star Dayna Adams Receptionist Guest Star J.J. Abrams Executive Producer, Writer John Eisendrath Executive Producer Ken Olin Executive Producer, Director