Discovering that NTAC is behind the disease plaguing the 4400s, Tom and Diana try to get to the bottom of NTAC’s cover-up, while Kyle considers turning himself in.

When 4400s around the world come down with life-threatening illnesses, Ryland comes back to NTAC and orders the sick – and even unaffected 4400s – to be quarantined. Tom and…

A 4400 terrorist releases a signal at NTAC that makes the men violent, forcing a lockdown of the facility. Lilly questions how the Centre is handling her daughter, and Shawn…

NTAC is keen to find Jordan Collier’s killer as Tom is desperate to find Kyle.

After living for 8 years in an alternate world that only Tom and Alana remember the world with the 4400 has returned as it was at the second the 8…

A morbid premonition from Maia threatens the future of the 4400 Center.

Tom and Diana investigate a 4400 whose ability to increase the human bodies’ metabolism just may be this weight-conscious world’s answer to the ultimate fat-burner.

Richard must protect his family when he and Lily are discovered to be 4400s.

Tom and Diana investigate a mysterious structure being built at a psychiatric hospital, based on the drawings of one of their patients who’s a 4400.

Diana helps Tom break Kyle out of NTAC quarantine, eventually leading them to discover the truth behind the 4400.

Tom and Diana investigate Oliver Knox, a 4400 suspected of being a serial murderer.

Tom and Diana investigate a 4400 who has used his ability of enhanced reflexes to become a vigilante.

Paramedics try to resuscitate Susan Farrell. They believe that she took promicin and lost the 50/50 lotto that comes with it. Danny is certain that she did not take the…

Meghan and Diana learn how to remove the entity from Tom, but the procedure is dangerous. Meanwhile, Shawn finds help in his attempt to rescue Kevin from Promise City; and…

Tom and Diana must race to find the source of a computer virus that could bring down Ubient software, one of the world’s largest software companies that is run by…

“One of Us” is the tenth episode of season four of the science fiction television series The 4400. The episode aired on August 19, 2007 on the USA Network.

“No Exit” is the eighth episode of season four of the science fiction television series The 4400. The episode aired on August 5, 2007 on the USA Network.

“Till We Have Built Jerusalem” is the seventh episode of season four of the science fiction television series The 4400. The episode originally aired on July 29, 2007 on the…

Jordan wants Shawn to rejoin the movement. Meanwhile, a 4400 with an amazing ability disappears.

Tom tracks Jordan to a small town, where he meets a woman who can relieve people’s stress by talking to them. Meanwhile, Marco and Diana have a nice talk. Maia’s…

“The Truth and Nothing But the Truth” is the fourth episode of season four of the science fiction television series The 4400. The episode aired July 8, 2007 on the…

An elderly woman develops the ability to astral project unseen by others, but she is stuck in limbo when her body is murdered, and she must find a way to…

“Fear Itself” is the second episode of season four of the science fiction television series The 4400. The episode aired June 24, 2007 on the USA Network.

“The Wrath of Graham” is the first episode of season four of the science fiction television series The 4400. The episode aired June 17, 2007 on the USA Network. The…

Tom and Diana continue their investigation on Jordan Collier’s plan for mankind. Dennis Ryland rejoins NTAC. Isabelle prepares for battle.

NTAC and the 4400 Center work together to find Jordan Collier. Kyle Baldwin gets a surprising visitor at the state prison.

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…

“The Ballad of Kevin and Tess” is the ninth episode of season three of the science fiction television series The 4400. The episode aired July 30, 2006 on the USA…

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

Tom and Diana continue to investigate the disappearance of the 4400 children. Isabelle and Shawn’s relationship becomes public.

Someone is targeting young 4400’s and Maia gets kidnapped. A mistake from Shawn’s past comes back to haunt him. Richard is given a position of authority at the 4400 Center.

Tom is accused of murdering TJ Kim. 17 year old Boyd Gelder has the ability to change his appearance whenever he chooses. Meanwhile, Shawn and Isabelle grow closer.

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…

Carter and Allison investigate when a scientist mysteriously disappears from a sealed biosphere. Meanwhile, the “Fixer” tries to make Eureka’s efforts more profitable.

The team finds a world that possesses Ancient defense technology, where Colonel Sheppard finds himself a pawn in the rivalry between the heirs to the throne.

Lana joins a sorority to get housing for her last-minute college registration, but the sisters have a deadly agenda which involves turning Lana into a vampire like themselves and sending…

Lana and Lionel have a secret meeting, after which Lana is shot. While Jimmy is observing photos of the encounter, he is knocked unconscious. While unconscious Jimmy dreams about what…

Patrick Jane and the CBI team investigate when the body of a high-end luxury car sales woman is found in the trunk of a Bentley in the dealership’s showroom.

Sam contacts Dean after being missing for a week. When they reunite, Dean finds Sam covered in blood and with no recollection of what happened.