Allison runs into the man who kidnapped her daughter in one of her dreams at the District Attorney's office. She learns that he is a "Good Samaritan" who witnessed a robbery and is fully cooperating. After learning that he has kidnapped multiple young women, Allison reaches a roadblock in her investigation that leads her to yet another unbelievable breakthrough in the case. Meanwhile, Joe tutors Ariel in math, which in turn brings Allison to another shocking discovery.

Allison's daughter Ariel dreams that she is a young girl named Sarah being held captive by an ogre in a castle. While Joe agonizes over the possibility that both of his daughters have inherited their mother's psychic abilities, Allison tries to help Ariel and interpret the dream. However, Allison's advice provokes Ariel to run away from a field trip in order to follow up a clue.

Allison encounters a psychopathic doctor who raped and murdered numerous teenage girls years ago. After learning that an evil soul has been possessing people, she sets forth to stop it before a new victim is found. Meanwhile, Ariel's math teacher accuses her of cheating and Joe steps up to her defense.

Allison is having dreams about an old high school friend and decides to find her. Meanwhile a man seeks the district attorney's help in finding his daughter who has been missing for a week.

Allison dreams about hitting a girl with her car and a woman who's house is haunted. She finds out that the woman killed herself. Now Allison is trying to put all the pieces together.

Allison has problems with staying impartial about a case when she develops maternal feelings for a teenage boy who is accused of killing his former boss. Bridget finds a stray dog and want's to keep it.

Allison gets Joe a camcorder for his birthday. But soon she starts seeing disturbing images through it that may or may not be connected to a murder.

Allison and Ariel are starting to have dreams about a crime. They are dreaming about it from different perspectives, which reveals two suspects.

Allison has recurring dreams of her past, causing strange and shocking changes to her current life. Her dreams of the past threaten her life in the present as she tries to stop a predator before he strikes.

Larry Watt, a defense attorney who has caused trouble in Allison's past, asks Allison to be a consultant for him. Low on money, Allison accepts his offer. She later has a dream that his client murdered his wife.

In the fourth season finale, Allison tries to help a young couple who thinks their house is haunted, but her efforts result in murder. Meanwhile, Meghan Doyle tries to sell her controlling interest in Joe's invention and Joe tries to save his own stake in it. Also, the election between Devalos and Tom Van Dyke takes place.

Allison is asked to help find a missing daughter and her visions seem to incriminate her father, but Allison believes this is wrong after a chat with the woman's mother. Meanwhile, Joe is suffering from sleep deprivation, while Scanlon and Lynn's relationship is severely tested.