Thrown for a serious loop in the final episode of Season 2 of J.J. Abrams's hit series, CIA agent Sydney Bristow (Jennifer Garner) starts her third year in prime time dealing with a life -- and memory -- left in shambles. Luckily she has her resourceful father (Victor Garber) and her trusty partner (Michael Vartan) to offer assistance as she searches for the truth. But a new double agent may be closer -- and more dangerous -- than Sydney suspects