Plot summary: The 4400 tells the stories of 4,400 abductees after they are returned to earth. Some of those returned have been affected in mysterious ways with certain abilities, both good and bad. In the words of the executive producers, these are stories of people dealing with traumatic changes, driven by the mystery of what happened and why. The pilot begins with a ball of light sailing towards Earth, but rather than the expected catastrophic event, thousands of returned abductees are left with no memory of their otherworldly experiences. Each has been gone anywhere from a few months to several decades, but hasn't aged a day. The show follows two NSA agents Tom Baldwin (played by Joel Gretsch) and Diana Skouris (played by Jacqueline McKenzie) who are trying to figure out what happened and why.

Creator: René Echevarria, Scott Peters

Network: USA Network

Release date: 11 July 2004 (USA)

Genre: Sci-Fi | Drama | Mystery | Thriller

Production credits: Renegade 83, American Zoetrope, CBS Paramount Network Television

Cast:

Joel Gretsch: Tom Baldwin

Jacqueline McKenzie: Diana Skouris

Patrick John Flueger: Shawn Farrell

Conchita Campbell: Maia Rutledge

Chad Faust: Kyle Baldwin

Mahershala Ali: Richard Tyler

Billy Campbell: Jordan Collier

Links: Pictures - Videos - Forum thread - Episode Guide below

Summer Glau as Tess Doerner.

Episode Guide (click on the title of the episode for more information):

Season 2, episode 1: Wake-Up Call

Summer Glau in The 4400 2x01 Wake-Up Call

Original Air Date: 5 June 2005

Kyle tries to visit his cousin Shawn at The 4400 Center but is thrown out. Richard and Lily are desperate to protect their infant daughter, Isabelle from Collier and other maniacs, and a schizophrenic 4400, Tess Doerner, compells the others at Abendson Psychiatric Hospital to build a tower based on her sketches, which she believed to be her means of returning to the future.

Season 3, episode 8: The Ballad Of Kevin And Tess

Summer Glau in The 4400 3x08 The Ballad Of Kevin And Tess

Original Air Date: 30 July 2006

Dr. Burkhoff continues his experiments on himself and forces them on another person and Maia has a nightmare where Diana looks like a monster. Kevin Burkhoff is forced to go on the run when his Promicin research makes him a target for elimination. In order to get to Kevin before anyone else does, Tom and Diana look to Tess Doerner for help. A rock star tries to involve Shawn in his health that demands almost all of his time.

Season 3, episode 11: Terrible Swift Sword

Summer Glau in The 4400 3x11 Terrible Swift Sword

Original Air Date: 20 August 2006

The Nova Group escapes from prison, so Hyland decides to develop his troops at the fastest and most ruthless possible. Richard is convinced that it is only a matter of time before his daughter leads a strike against the 4400. Later on, Shawn, Richard, Kevin Burkhoff, and Tess Doerner gather at a warehouse where the stolen promicin is being stored. They ask Jordan what he wants to do with the promicin. Destroy it? No, Jordan wants to give it away. To everybody.

Season 3, episode 12: Fifty-Fifty

Summer Glau in The 4400 3x12 Fifty-Fifty

Original Air Date: 27 August 2006

Jordan Collier’s strategy is spread out 4400-anilities to everybody who wants them, and Devon is eager to be the first to try. NTAC is closing in on them. Jordan, Richard, Kevin, Tess, and Boyd Gelder meet at the abandoned airplane hanger where the stolen promicin is being stored. Richard uses his telekinesis to try and destroy the vials of promicin, but Tess uses her ability to compel him to stop.

Season 4, episode 1: Wrath Of Graham

Summer Glau in The 4400 4x01 The Wrath Of Graham

Original Air Date: 17 June 2007

A high school kid named Graham develops an ability which makes people worship him to the point of sacrificing their lives for him. Tom visits Isabelle in jail, hoping to get information on the whereabouts of Alana who’s been missing for months. Marco calls Diana to let her know that her sister April has promicin and is nowhere to be found. NTAC gets a new director. Kyle meets a young woman named Cassie who has some advice about how to get Shawn out of his coma. Jordan Collier who’s still hidding with Kevin and Tess gets bothered by his conscience. Meanwhile, NTAC gets a new director.

Season 4, episode 9: Daddy's Little Girl

Summer Glau in The 4400 4x09 Daddy's Little Girl

Original Air Date: 12 August 2007

Richard kidnaps Isabelle from Collier’s Promise City in the hope to start a new life with his daughter. In other events, Kevin Burkoff calls Shawn for help when Tess has a schizophrenic episode and uses her ability to take control of people at a 1950’s diner, thinking that she’s 16 again.

Season 4, episode 11: Ghost In The Machine

Summer Glau's voice in The 4400 4x11 Ghost in the Machine

Original Air Date: 26 August 2007

A computer virus attacks a large software company owned by a suspected member of The Marked. Maia visits Promise City and receives an unexpected birthday gift. At the 4400 Center, Kyle kidnaps Kevin Burkoff and brings him to Promise City. Collier apologizes to Kevin but can’t allow him to develop a promicin test that would tell someone whether or not they would die if they took the shot.
Summer's character appears in this episode in voice only.

Season 4, episode 12: Tiny Machines

Summer Glau in The 4400 4x12 Tiny Machines

Original Air Date: 9 September 2007

Isabelle works with Tom in order to get close to Jordan. Shawn recruits a small band of promicin positives, including Tess, to break Kevin out of Promise City. Tom and Diana face off in the backroom of a grocery store, and Diana is forced to shoot Tom.

Trivias :

Summer's character is not credited in episode 4.11 "Ghost in the Machine", she appears in this episode in voice only.