Lily and the baby are hunted by a shotgun-toting preacher; Tom and Diana try to isolate the cause of the strange behavior at the hospital; Diana discovers Maia's diary; and Shawn contacts Kyle.

A baseball player unsettled by his ability to read the thoughts of others turns to NTAC for help and is instead used to spy on Jordan Collier. Meanwhile, Diana's younger sister visits; and Richard and Lily's life on the lam is complicated by their daughter's growing powers.

A 4400 with the ability to induce rapid weight loss attracts the attention of Tom and Diana; Richard, Lily and their child find refuge in the company of a fellow 4400; a pop star endorses Jordan's cause; and Kyle is caught up in the frenzy when a frat party gets out of control.