Allison tries to help investigator Cynthia Keener find a missing teenage girl. Meanwhile, Ariel dreams of Allison's high school days from the 80's after being asked out to a concert without any chaperones.

Joe brings a reluctant Allison with him to a party at a prospective employer's house. Later on, the employer's daughter disappears, leading Allison to connect her recent dreams about Paris to the disappearance. Now it's up to Allison to save the daughter, which coincidentally will also secure Joe a job.

A young deaf girl is kidnapped, causing Allison to completely lose her hearing. With Allison at a loss, Joe decides to help her and Cynthia Keener investigate the kidnapping.

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.

Devalos tries to reclaim the D.A.'s office. Allison's support of Devalos is tested when she has visions of Senator Jed Garrity, Devalos' strongest political supporter, involved in a horrible conspiracy.

Joe's mother pays a surprise visit, which worries Allison because she hasn't seen her since her psychic abilities became public knowledge. Meanwhile, Cynthia Keener tries to push Allison's dreams towards outstanding cases and Devalos and Scanlon are reunited with Allison in an unexpected way after an arson-related murder.

Allison tries to find the link between Ariel's prediction of a classmate's mother's death, dreams related to her case with Cynthia, and Devalos' murder case. She also must try to keep her mother-in-law Marjorie's secret hidden from Joe.

While working to locate a missing local girl, Allison learns about secrets from Cynthia Keener's past. Meanwhile, Joe's relationship with Allison is tested after Bridgette's science class project sparks his imagination.

A shocking and brutal conclusion awaits Allison and Cynthia as they delve into the decade-old case of the kidnapping and murder of Cynthia's daughter. Meanwhile, Joe tries to get funding for a new invention and Bridgette predicts good fortunes for her dad.

As Allison teams up with Scanlon to track down the dangerous "cougar" they believe is responsible for the murders of young men, she also has visions that Devalos' campaign is in jeopardy, with someone plotting against him.

When Joe presents his new solar power-based invention to an investment firm, he piques the interest of venture capitalist Meghan Doyle. Meanwhile, FBI profiler agent Edward Cooper claims his return to Phoenix is to track down another serial killer, but Allison's dreams tell her otherwise.

Allison has visions of a friend of Scanlon and Lynn DiNovi dying in a home mishap. This causes her to struggle with connecting some recent "accidental" deaths, consequently putting her own health in jeopardy.

Allison meets Meghan Doyle, Joe's new business partner. Meanwhile, her old car stops working and Joe surprises her with a nice looking used car. The car ends up being the center of a horrible unsolved crime though.

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.