The 4400 Season Four

Wrath of Graham
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 shows up to deal with the high school kid. A high school student develops an ability after injecting promicin. Tom visits Isabelle in jail, while Diana searches for her missing sister. Following the advice of a young woman, named Cassie, Kyle is able to wake Shawn from his coma. Jordan Collier's conscience gets to him. Meanwhile, NTAC gets a new director.

Fear Itself
Diana returns from Spain. NTAC tries to identify the person whose ability makes people's worst fears come true. Shawn returns home from the hospital and his brother Danny tells him that he's thinking about taking promicin. Kyle finds out some interesting facts about Cassie. Tom and Diana search for someone who has the ability to make people's worst fears come true. Danny seeks Shawn's help to find a promicin shot. Meanwhile, Cassie leads Kyle to a book that contains a prophecy about Jordan Collier.
Audrey Parker's Come and Gone
After taking promicin, an old lady named Audrey Parker develops the ability to astral project from her body. When she's murdered, her spirit tries to reach Tom and Diana to help them find her killer. Shawn decides to re-open the 4400 center and start healing again despite the government's warnings. Ben and Maia come to Seattle to visit Diana. Cassie leads Kyle to some interesting information. Audrey Parker develops the ability to astral project from her body after taking Promicin. But when she is murdered she tries to use her ability to lead Tom and Diana to her killer. Shawn decides to start healing again even though he is warned by the government to stop. Meanwhile, Ben and Maia return to Seattle to visit Diana.

The Truth and Nothing But the Truth
April's new ability puts her in danger. Meanwhile, Shawn is approached to run for public office. Kyle helps Isabelle.
Try the Pie
After realizing Tom knows he is promicin-positive, Kyle joins Jordan in a remote town called Evanston. Tom follows Kyle, and learns the remarkable truth about Evanston: all of its residents are promicin-positive. Meanwhile, Maia's visions are giving her nightmares, which leads Shawn to make a difficult decision.
The Marked
Jordan wants Shawn to rejoin the movement. Meanwhile, Tom and Diana search for a 4400 with an amazing ability.
Till We Have Built Jerusalem
Jordan and his followers move to Seattle. Meanwhile, Maia disappears and Shawn has trouble on his campaign trail.

No Exit
Jordan and his followers along with NTAC agents must work together when they are trapped inside NTAC headquarters.
Daddy's Little Girl
Richard hopes to start over and kidnaps Isabelle from Jordan Collier's Promise City. Meanwhile, Tess has taken over a diner and Shawn is asked to intervene.
One of Us
The Director of National Intelligence pressures NTAC to pursue Richard and Isabelle Tyler. Richard is visited by his dead wife. Meanwhile, Shawn and Kevin Burkoff announce that they have developed a test that can tell people if taking promicin will cause their death. Tom dreams about the future and the 4400.
Ghost in the Machine
A computer virus attacks a large software company owned by a suspected member of the Marked. Elsewhere, Maia visits Promise City and receives an unexpected birthday gift.

Tiny Machines
Isabelle is working with Tom in order to get close to Jordan. Rebecca Parrish talks with Tom about the plan with Isabelle. She is concerned that Maia's visions could complicate things and wants Tom to make sure that Maia won't have the wrong vision at the wrong time. Meanwhile, Shawn recruits a small band of Promicin positives to bust Kevin out of Promise City. Later in the episode, Tom and Diana face off, and Isabelle delivers Jordan Collier to the Marked.
The Great Leap Forward
Danny Farrell's newfound ability to spread promicin leads to several hundred deaths, including his mother. NTAC is forced to ask Promise City for help to get the situation under control. After being freed from the Marked, Tom must help Jordan Collier to escape as well. The group orders Isabelle to kill Kyle Baldwin after he takes over leadership at Promise City in Jordan's absence. Shawn must make a difficult decision to stop his brother from further spreading Promicin.