Sydney Bristow is a young, athletic, college graduate who was recruited her freshman year as a secret agent for SD-6, a top-secret branch of the CIA. After a few years -- after Sydney confides her lifestyle to her boyfriend, the evil head of SD-6 -- Arvin Sloan, has him killed. Sydney learns that SD-6 is part of a rogue international agency called the Alliance of 12, out to rule the world. She becomes a double agent, working with the real CIA to bring down SD-6 with the assistance of her handler, Michael Vaughn, and her estranged father Jack Bristow -- also a double agent. Along the way, Sydney fights various rival agents, rival terrorist groups, and traitors all the while keeping her cloak-and-dagger lifestyle a secret from her friends. (Season 1) Written by
Not just a secret agent. She's a concealed weapon.
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Did You Know?
In episode ten of the third season it is finally revealed Sark's first name is Julian. See more
One episode has brief scene in Helsinki, Finland. The scene involves high skyscrapers, but no such buildings exist in Helsinki. See more
Ultimately you'll do what you want, that's what free will's all about.
All episodes end with the word "ALIAS" appearing on the screen, except for the final episode of the final season in which the message "Thank you for five wonderful years" appears on screen instead. See more
Referenced in Heroes Unmasked: Voices
Written by J.J. Abrams
Performed by Michael Giacchino See more