Golden Globe Award-winning actress Jennifer Garner is Sydney Bristow. Syd's not exactly your average grad student. Her life might appear normal, but she's hiding a secret life working as a spy for the CIA.

Sydney Bristow was recruited as an undergrad to work for SD-6, which she thought was a government agency. However, when her fiancé is killed by SD-6 agents, she finds out that SD-6 is actually a counter-government agency. Sydney approaches the CIA and becomes a double agent.

Episode List:

* 67: Authorized Personnel Only (1)
* 68: Authorized Personnel Only (2)
* 69: The Awful Truth 1/12/2005
* 70: Ice 1/19/2005
* 71: Welcome To Liberty Village
* 72: Nocturne 2/9/2005
* 73: Détente 2/16/2005
* 74: Echoes 2/23/2005
* 75: A Man of His Word
* 76: The Index
* 77: The Road Home
* 78: The Orphan
* 79: Tuesday
* 80: Nightingale
* 81: Pandora
* 82: Another Mister Sloane
* 83: A Clean Conscience
* 84: Mirage
* 85: In Dreams...
* 86: The Descent
* 87: Search and Rescue
* 88: Before the Flood