The 4400 returns Sunday, June 11 at 9/8C with a two-hour premiere event picking up mere seconds after baby Isabelle became a beautiful 20-year-old woman. Her father, Richard, must deal with her sudden transformation, and an even more surprising change in Lily. Meanwhile, Tom and Diana pursue a radical 4400 organization called the Nova Group that may also have ties to Shawn and The 4400 Center.