"4400" is a science fiction television series that originally aired from 2004 to 2007. The show follows the story of 4,400 people who mysteriously reappear after being missing for years, some even decades. Each of these individuals has unique abilities that develop after their return, leading to various challenges and conflicts. The series explores themes of identity, societal acceptance, and the consequences of extraordinary powers. As the characters navigate their new lives, they face government scrutiny and personal struggles, all while trying to understand the reasons behind their disappearance and return. The show features a diverse cast and intertwines their stories throughout its four seasons.