: NSA agents Tom Baldwin and Diana Skouris investigate the mystery for the National Threat Assessment Command (NTAC).
A reimagined version titled 4400 premiered on The CW in 2021. The 4400 Complete Collection: Series 1-4 [DVD] - Amazon.com : NSA agents Tom Baldwin and Diana Skouris
: Thousands of missing persons return all at once in a ball of light. : NSA agents Tom Baldwin and Diana Skouris
: They haven't aged a day and have no memory of where they were. : NSA agents Tom Baldwin and Diana Skouris
The original The 4400 aired for four seasons on the USA Network.