Sydney Bristow, an agent who has been tricked to believe she is working for the U.S. government, is actually working for a criminal organization named the Alliance of Twelve. Upon learning this, Sydney becomes a double agent for the real CIA.
Jennifer Garner
as Sydney Bristow
Michael Vartan
as Michael Vaughn
Victor Garber
as Jack Bristow
Ron Rifkin
as Arvin Sloane
Carl Lumbly
as Marcus Dixon
Kevin Weisman
as Marshall Flinkman
Rachel Nichols
as Rachel Gibson
Amy Acker
as Kelly Peyton
