Kennex and Dorian must protect a witness in a major murder trial; Capt. Maldonado butts heads with a defendant.

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.

A 4400 with the ability to repair damaged chromosomes hides a shocking past. And while Richard seeks out a tormentor among his Korean War buddies, Shawn reconnects with his family…

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…

Tom finds himself in a world where the 4400 never happened.

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.

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…

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.

“Daddy’s Little Girl” is the ninth episode of season four of the science fiction television series The 4400. The episode aired on August 12, 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…

“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.

NOVA group members that were in the custody of NTAC escape from jail with outside help from Jordan Collier. Diana tells April about her relationship with Ben. Shawn and Richard…

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.

With the help of Dennis Ryland, NTAC track down the remining members of the NOVA group. Nikki pays Shawn a visit.

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.

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…

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…

Wormholes randomly materialize around Eureka as the Department of Defense is set to shut the town.

The people of Eureka are being kidnapped and replaced by body-doubles one by one unless Allison, Fargo and Zane can figure out how to avoid capture and save their town.

Eureka is cut off from the world by a malfunctioning experiment that threatens to eradicate the town’s populace.

Jack and Allison’s perfect honeymoon is interrupted when sabotage is discovered in Eureka. Elsewhere, Holly faces another hurdle to remain intact.

When Allison’s genius older brother comes to meet her new husband, Carter feels the pressure of not being smart enough to measure up.

Carter’s romantic surprise for Allison turns deadly when they’re trapped in a sinking marine lab with time and oxygen quickly running out.

Henry conducts a preparedness drill that winds up a disaster and Fargo faces a hard reality.

Beverly Barlowe resurfaces in Eureka seeking Carter’s help to free the Astraeus crew, and the rescue plan lands Carter in the crew’s virtual world.

The town huddles in a last attempt to locate the vanished Astraeus before it’s too late!

The Astraeus crew returns to Eureka four years later and must adapt to a myriad of changes, including a more oppressive version of Deputy Andy.

The quaint town of geniuses is transformed into animated versions of themselves. Sheriff Carter and Allison Blake are secretly planning the perfect holiday surprise for their kids. But a mysterious…

When an explosion in the Astraeus lab accidentally sends Andy to Titan the team must devise a plan to save him before it’s too late! Eureka

When Grant and Carter become stranded, they must race back in time to save Eureka.

Eureka’s citizens face the return of people from the past; Global Dynamics tests a new device.

When Sara gives Andy a (as Zane calls it ) an EMO download to give him emotion, she inadvertently affects all Level 6 AIs. Including Tiny. She escapes while being…