Vaughn & Sydney (Alias) from list TV Couples by roger chapman

Few TV shows are as mystifying and fascinating as this ABC series starring Jennifer Garner. As Sydney Bristow, a grad student who's also a double agent for the CIA and one of its adversaries, SD-6, Garner transforms herself -- literally and figuratively -- from a rookie into a veteran agent as she contorts through every plot twist and outrageous costume thrown her way.