Tom returns to work at the Department of Homeland Security with desk duty, but Diana cuts through the red tape and repartners with him. She also formally adopts Maia.
A baseball playing returnee with mind reading abilities comes to the NTAC for help, but they send him to spy on Jordan Collier. Diana recieves a visit from her sister. As Richard and Lily's daughter's powers grow, she complicates their life on the lam.
Tom and Diana investigate a member of the 4400 who is auctioning off his ability to burn fat. A pop star arrives at Jordan's 4400 Center to train, while Shawn works on a recruitment video. ichard and Lily travel to Montana to meet with another member of the 4400.
A school teacher terrifies parents with her supernatural ability to inspire artistic students. Meanwhile, Richard and Lily are confronted by police, and Jordan warns Shawn not to overuse his healing gift.
Maia's vision fortells a threat to The 4400 Center and Jordan.
Tom and Diana investigate a mysterious man, and when Tom returns to the office, all traces of The 4400 gone and that he is the only person who remembers any of it.
Diana and Tom must stop a member of the 4400 who has the potential to release a deadly plague upon humanity.
Diana and Tom investigate a 4400 who has the ability to repair birth defects in unborn children. However, he has an unsavory past that might prevent him from using his gift properly.
Tom and NTAC are racing against time to capture Jordan Collier's assassin.
A member of the 4400 launches a terrorist attack.
A plague is spreading through the 4400 and no one is sure how to stop it before it kills them all.
Diana and Tom find the source of the plague affecting The 4400.