Premiered July 11, 2004

4400 people, assumed to be dead or missing over the past sixty years, reappear with no memories of where they were taken.

SYNOPSIS:
A comet that was supposed to fly by the Earth suddenly changes course, prompt countries all around the world to launch nuclear missiles in an attempt to destroy it before it can destroy the planet. The missiles make contact with the comet and explode, but do no damage.

The ball of light enters the atmosphere, and just when it looks like humanity is about to become extinct, the ball slows and begins to hover over a lake. The ball of light then explodes outward in a concussive burst. Leaving behind it are 4400 people. Men, women and children of all ages looking confused, wearing clothes which seems to span a sixty year period.

The 4400 are then rounded up and put in quarantine, and after six weeks they are released back to their families. Soon after their release, some of the returnees begin to experience unexplainable, and for some, uncontrollable new abilities. Abilities of all kinds show up among the 4400. Tom Baldwin and Diana Skouris, two Homeland Security agents, are assigned the mission to unravel the mystery behind the 4400.