7. YEARS GO BY
Second season finale, May 4, 2003
There were shattering revelations aplenty in "Alias" during its five-season life. But this episode was a home run. We saw Sydney (left) discover the truth about fake Francie and then engage Francie in a smackdown of epic proportions. And then we saw Sydney wake up in Hong Kong, only to discover that two years have passed, that she was believed to be dead, and that Vaughn (right) has married someone else. Show creator J.J. Abrams later showed his affection for this kind of time leaping with ever more fervor on "Lost."