What appears to be a comet slows, hovers and stops, then bursts forth to reveal 4,400 people who were presumed dead or missing over the past 50 years. They look exactly the same as the moment they disappeared, but some of the returnees now have special powers. After one of the 4,400 commits a murder, a special division of the Homeland Security Department is formed to monitor them.
Air Dates: 2004 - Present
Genres: Drama, Science fiction