The 4400 (pronounced "the forty-four hundred") is a science fiction television series produced by CBS Paramount Network Television in association with BSkyB, Renegade 83, and American Zoetrope for USA Network in the United States and Sky One in the United Kingdom. It was created and written by Scott Peters and René Echevarria, and it starred Joel Gretsch and Jacqueline McKenzie. The series ran for four seasons from July 11, 2004, to September 16, 2007. Premise In the series' pilot episode, a ball of light deposits a group of 4400 people in the Cascade Range foothills near Mount Rainier, Washington in the United States. Each of the 4400 had disappeared in a beam of green light in 1946 or after. None of them have aged from the time of their disappearance. Confused and disoriented, they have no memories of what transpired prior to their return. Title Creator Scott Peters has stated that the series was originally titled "A Light in the Sky", but looking for something unique he decided to "play around with numbers" instead and arrived at "4400" because it "just sounded cool" and "was a very round number with two 4s and two 0s". Synopsis The National Threat Assessment Command (NTAC), a division of the Department of Homeland Security, is in charge of dealing with the return of the 4400. Dennis Ryland is the head of NTAC. Ryland assigns Tom Baldwin and Diana Skouris as the lead team to investigate the 4400. In the second season, Ryland goes to Washington and is replaced by Nina Jarvis. In the fourth season, Meghan Doyle takes over as the head of NTAC. Many of the returnees have trouble getting their lives back on track after being gone from the world for years. More significantly, a small number of the returnees begin to manifest paranormal abilities, such as telekinesis, telepathy and precognition, as well as other "gifts". For example, in the pilot, Shawn Farrell manifests an ability to heal the broken neck of a dead bird, bringing it back to life. In addition, one of the 4400, Lily Moore, has become pregnant between her disappearance and return. The first-season finale, "White Light", reveals that the 4400 were abducted not by aliens, but by humans from the Earth's future, that Kyle Baldwin was to be their "messenger", and that they were returned to avert a catastrophe. By the second season, it is revealed that