Gary Navarro is arrested for the second attempt to assassinate Dennis Ryland. Knowing she is the key to her mother's survival, Isabelle attempts to kill herself by jumping off the 4400 center building only to survive without a scratch. Matthew Ross expresses his displeasure at her actions and tells her of the destiny she is to face. Isabelle is troubled about what Matthew told her, but after a discussion with Shawn she decides it's her choice with what she does with her life. Matthew gives Isabelle a substance that can kill her if it's injected.

The episode was rated 7.66 from 107 votes.

Carl Morrissey is a lowly supermarket employee who happens to be one of the 4400 returned abductees. He uses his new found powers - enhanced reflexes and strength - to become a vigilante and fight crime in his neighborhood. Meanwhile, Lily is thrown in jail for violating the restraining order while looking in on her daughter and ex-husband's new life. After picking up Lily from the police, Richard and Lily go back to the apartment they now share and we see the romance between the two begin to become more serious. Also, Shawn begins to learn more about his healing powers, and we are left with a cliffhanger ending of whether he will heal his cousin.

The episode was rated 7.62 from 237 votes.

Tom and Diana's investigation into a series of gruesome murders leads them to uncover another conspiracy within the government. At the 4400 Center, Shawn receives a gift from another returnee that allows him to see his future.

The episode was rated 7.62 from 124 votes.

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.

The episode was rated 7.62 from 141 votes.

It's been one year since the 4400 returned. After a period of intense medical observation, Tom has returned to NTAC in a limited capacity, assigned only to desk duty. Diana, having been through a series of inept partners, finally finds a way to cut through the red tape and get Tom back, all while in the midst of formally adopting Maia. Meanwhile, Richard, Lily and the baby are still living in meager conditions in a mountain cabin far away from Jordan. Jordan has now closed Arcadia Estates, and is on the verge of opening "The 4400 Centers," a place for non-members of the 4400 to discover "the 4400 within themselves." Collier becomes Shawn's guardian, and enlists him to heal important benefactors of the Centers.

The episode was rated 7.60 from 162 votes.

Isabelle seeks revenge on the Nova Group after they attack Shawn. Alana confronts the man responsible for killing her husband and son in a car accident nine years ago.

The episode was rated 7.57 from 132 votes.

Tom and Diana are drugged with a hallucinogen, that was created from oil that was secreted from the hands of a 4400.

The episode was rated 7.55 from 123 votes.

A male 4400 originally from Rwanda repairs bad chromosomes of unborn. Kyle is utterly despaired as he suddenly remembers what he did during his blackout. Rishard attends a co-veteran's funeral. Diana takes s hard family decision.

The episode was rated 7.55 from 143 votes.

It's been one year since the 4400 returned. After a period of intense medical observation, Tom has returned to NTAC in a limited capacity, assigned only to desk duty. Diana, having been through a series of inept partners, finally finds a way to cut through the red tape and get Tom back, all while in the midst of formally adopting Maia. Meanwhile, Richard, Lily and the baby are still living in meager conditions in a mountain cabin far away from Jordan. Jordan has now closed Arcadia Estates, and is on the verge of opening "The 4400 Centers," a place for non-members of the 4400 to discover "the 4400 within themselves." Collier becomes Shawn's guardian, and enlists him to heal important benefactors of the Centers.

The episode was rated 7.53 from 182 votes.

Gary Navarro, a minor league baseball player back after a 30-year absence, finds that hearing everyone's unspoken thoughts is driving him to the edge of madness. When he seeks help from NTAC, the higher-ups are more interested in how he can unearth information about Jordan Collier than how they can assist Gary with getting his life back. As the case occupies the majority of his time, Tom finds himself struggling with his responsibilities as a single father. Meanwhile, Kyle starts to get his life back through the prospect of a new relationship, Diana finds herself dealing with the unexpected arrival of her younger sister April, and as Richard, Lily, and Isabelle continue their life on the run, Richard grows increasingly disturbed by his daughter's apparent abilities.

The episode was rated 7.52 from 162 votes.