Ryland and other government officials are on trial for withholding vital information that they discovered about the returnees when a disturbing sound is heard the courtroom. Tom and Diana, with the help of Gary Navarro, try and track down T.J Kim, who they believe is responsible for the piercing sound heard in the courtroom. Richard and Lily are forced to deal with a now grown Isabelle While Lily also suffers from a rapid aging disease that Shawn is unable to heal. Tom and Diana also investigate a radical organisation called the Nova Group that appears to have ties with Shawn and the 4400 Center.
Elenco: Joel Gretsch , Chad Faust , Billy Campbell , Conchita Campbell , Samantha Ferris , Mahershala Ali , Megalyn Echikunwoke , Patrick John Flueger , Jacqueline McKenzie , Jenni Baird , Kaj-Erik Eriksen , Karina Lombard , Kavan Smith , Laura Allen , Mahershalalhashbaz Ali , Megalyn Echikunwoke , Natasha Gregson Wagner , Peter Coyote , Rhonda Dent , Samantha Ferris , Summer Glau , Tristin Leffler .