Alias is an American action/drama television series created by J. J. Abrams which was broadcast on ABC from September 30, 2001 to May 22, 2006, spanning five seasons. It starred Jennifer Garner as Sydney Bristow, a CIA agent, who was usually seen wearing a colorful new disguise while undercover in some part of the world.
A major plotline of the series was the search for and recovery of artifacts created by Milo Rambaldi, a fictional Leonardo da Vinci-like inventor and Nostradamus-like prophet from the Renaissance period. This plot and some technologies used in the series pushed Alias into the genre of science fiction.
Major Characters http://alias.wikia.com/wiki/Major_Characters