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 Billy Campbell Disappeared in 2002. Although Collier still sufferers from the after effects of his encounter with prenatal Isabelle, the experience, for Jordan was an epiphany. The billionaire has become the self-proclaimed figurehead of the 4400, opening the very first 4400 Center, a place not only for fellow returnees, but ordinary people looking to "unlock" the 4400 within themselves. |
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 Mahershalhashbaz Ali A pilot in the Korean War who disappeared in 1951, Richard returned to find love with Lily Moore, the grand daughter of the woman he was engaged to before being abducted. Lily soon learned that she was pregnant and that Richard was the father. The baby was conceived while the two of them were in the future. After fleeing Arcadia estates, Richard and Lily now live with their daughter, Isabelle, in a remote cabin in the woods hiding from Jordan Collier and NTAC. |
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 Laura Allen Disappeared in 1993. Lily returned to find her husband Brian remarried and daughter Heidi believing his new wife to be her biological mother. While in quarantine, Lily met Richard Tyler and fell in love. Lily soon discovered that she was pregnant and that Richard was the father. The baby was conceived while the two of them were in the future. After fleeing Arcadia estates, Richard and Lily now live with their daughter, Isabelle, in a remote cabin in the woods hiding from Jordan Collier and NTAC. |
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 Patrick Flueger Disappeared in 2001. Returned with an ability to manipulate life-force, Shawn ran away and cut off all contact with his family. He now lives at the 4400 Center where he has become Collier's protégé, using his power to heal big money clients and generate revenue for the Center. |
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 Conchita Campbell Disappeared in 1946. Maia has been living with Diana for the past year, and has recently been adopted as her daughter. Although the young girl claims that she can no longer predict the future, Maia secretly keeps a journal filled with precognitive visions. |
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 Joel Gretsch His marriage to Linda officially over, Tom struggles to maintain a relationship with his son, Kyle. He returns to the field with partner Diana Skouris, working to avert the catastrophe the future warned him about on Highland Beach. |
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 Jacqueline McKenzie Diana has been reunited with Agent Baldwin after a series of inept partners. She's taken a huge step in her personal life by officially adopting 4400 Maia Rutledge as her daughter. |
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 Samantha Ferris The new head of NTAC's Pacific Northwest Division, replacing the promoted Dennis Ryland. |
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 Richard Kahan One of the brains in NTAC's theory room, Marco helps Tom and Diana make sense out of the countless ripple effects caused by the 4400. |
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 Peter Coyote Original supervisor of NTAC, the federal agency created to investigate and oversee the 4400. Dennis is Tom and Diana's boss, and is also a lifelong friend of Tom's. Dennis has been promoted to deputy director of NTAC and now resides in Washington, D.C. |
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 Chad Faust Shawn used his 4400 ability to bring Kyle out of a three-year coma. But Kyle, was in fact, not himself. He was inhabited by a being from the future, whose purpose was to warn humanity of a coming catastrophe. Having no recollection of any event that occurred while the future being was inside of him, Kyle spent a year in quarantine under observation. Now released from NTAC, Kyle is ready to catch up on lost time. |
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 Kaj-Erik Eriksen Danny was unable to forgive his brother, Shawn, for stealing girlfriend Nikki away from him. He is now an outspoken opponent of the 4400. |
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 Brooke Nevin 18-year-old Nikki was the girl-next-door to brothers Shawn and Danny Farrell. She broke up with Danny to be with Shawn upon his return. But after a fight with his brother Danny, Shawn was forced to leave both his family and Nikki behind. Nikki is now away at college. |
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| The 4400 |
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| NTAC |
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| OTHER KEY CHARACTERS |
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