The 4400 - Season 1

The 4400 is a science fiction television series that premiered in 2004. Season 1 introduces the central premise of the show, where 4,400 people who had previously gone missing over several decades suddenly reappear at the same time, all in a single day. These individuals have no memory of their disappearance and have not aged since the time they went missing. 

The first season of "The 4400" follows the lives of the returnees and the authorities' efforts to understand the mystery behind their sudden reappearance. The characters, who come from various time periods and backgrounds, each possess unique abilities or changes as a result of their disappearance.

The show delves into the personal struggles, adjustments, and challenges faced by both the returnees and the people around them. Government agents Tom Baldwin (Joel Gretsch) and Diana Skouris (Jacqueline McKenzie) are tasked with investigating the 4400 and helping them reintegrate into society. Over the course of the season, they uncover a larger conspiracy and begin to explore the potential connections between the returnees' abilities and their mysterious disappearance.

As the season progresses, viewers are introduced to various intriguing characters and storylines, each with their own supernatural or unusual abilities. These abilities range from telekinesis and precognition to healing powers and mind control.