1Pilot
The Catholic Church hires forensic psychologist Kristen Bouchard to determine whether a serial killer is possessed by a demon or merely a psychopath.
2177 Minutes
Kristen, David and Ben investigate a supposed miracle when a teenage girl comes back to life after being declared dead for almost two hours; Kristen meets with her former boss and runs into Leland Townsend.
33 Stars
After a high-strung theater producer's behavior turns from demanding to what is believed to be demonic, Kristen, David and Ben must assess the situation; Kristen discredits Leland Townsend, before he can ruin a 17-year-old boy's life.
4Rose390
The team are hired to evaluate a 9-year-old boy who takes a liking to David, which leaves them hopeful they can curb his violent behavior. Kristen worries about her young daughters who lie about a horror game their grandmother bought behind her back.
5October 31
David and Kristen disagree about an exorcism. Ben tries to debunk TV ghost hunters. The girls play a dangerous game with a psychotic schoolmate during a Halloween sleepover.
6Let x = 9
The Catholic Church asks Kristen, David and Ben to assess the veracity of a local prophetess, Grace Ling, and they are shaken when they see one of her visions come to life. Also, David struggles with jealousy when he sees God speaking with the prophetess, and to Kristen's dismay, her mother, Sheryl, and Leland begin a relationship.
7Vatican III
When Bridget confesses to murder during her exorcism, Monsignor Korecki asks Kristen, David and Ben to investigate if the details match any open cases and if the woman really is possessed by a demon.
82 Fathers
When David recognizes one of the sigils in the Poveglia Codex from his father Leon's artwork, he and Kristen journey to a remote art commune to investigate its meaning and how it's related to David's family.
9Exorcism Part 2
David is shocked to learn he is being sued for inflicting severe psychological harm on Caroline Hopkins, after he assisted in her exorcism. The accusation leads him to question his future as a priest, especially once he develops a very close connection with his defense attorney, Renée Harris.
107 Swans a Singin
Kristen, David and Ben are called to investigate an insidiously addictive Christmas song that's spreading among an increasing number of students, and the dangerous relationship between online influencers and their impressionable young followers.
11Room 320
After David is badly wounded, he is determined to fight off the menacing presence of death from his hospital bed.
12Justice x 2
Leland tries to get serial killer Orson Leroux's conviction overturned. Kristen is in court when her daughter, Laura, needs emergency heart surgery. David is a witness to a woman's evil nature.
13Book 27
David, Kristen and Ben assess whether a pregnant woman is possessed when she claims one of the twins she's carrying is evil. Their investigation leads to a fertility clinic where they discover a connection to all of their encounters throughout the season. Also, Kristen questions one of her daughters' capacity for evil upon realizing that she also used that fertility clinic.
1N Is for Night Terrors
The team is given the task of evaluating the likelihood of Leland being possessed, which if decided true, would require them to exorcise him.
2A Is for Angel
The team is charged with investigating a man who claims that he is hearing an angel.
3F Is for Fire
The team encounters a nine-year-old girl, Mathilda, who is seemingly haunted by a Jinn, a spirit in the Islamic faith.
4E Is for Elevator
The team is sent to investigate the disappearance of a teenage boy, Wyatt.
5Z Is for Zombies
Father Mulvehill asks the team for a confidential evaluation, as he fears that he might be the victim of diabolical oppression.
6C Is for Cop
After the shooting of an unarmed woman, the team is tasked with investigating the police officer who pulled the trigger.
7S Is for Silence
The team is dispatched to a monastery to investigate the corpse of Father Thomas, whose body has not decayed in the year following his death.
8B Is for Brain
Kristen, David, and Ben are sent to Cornell University, at the request of Bishop Marx, to investigate an electrode-based experiment dubbed the "God Helmet."
9U Is for U.F.O.
Bishop Marx tasks the team to investigate a UFO sighting, spotted by an air force pilot.
10O Is for Ovaphobia
Ben, David, and Kristen investigate the RSM Fertility clinic - since so many of their past cases have led back to the ominous clinic.
11I Is for IRS
The IRS taps the team to investigate the legitimacy of a new organization seeking religious status for tax exemption.
12D Is for Doll
At Dr. Boggs' request, the team is introduced to a recently widowed Catholic named Nathan, and his teenage son, Elijah.
13C Is for Cannibal
The team is sent to meet on campus with Mitch Jasper, a student with a growing compulsion to eat human flesh.
1The Demon of Death
David's relationship with Kristen takes a turn when he gives into his temptation. Meanwhile, the team is tasked with exploring a machine which should measure the weight of the human soul as it leaves a dying body.
2The Demon of Memes
David, Kristen, and Ben investigate a Slender-Man like internet meme that is quickly spiraling out of control and inciting teenagers to commit blasphemous acts in order to avoid death.
3The Demon of Sex
Sister Andrea joins the team to fix a demonically possessed marriage.
4The Demon of the Road
The team encounters a truck driver whose wife thinks he is possessed and explores the possibility of a demon haunting the highway.
5The Angel of Warning
Sister Andrea's career and sanity are on trial as she battles Leland. Meanwhile the team investigates an alleged angel sighting.
6The Demon of Algorithms
A single mother enlists the team to look into the potentially demonic ways a viral social app is terrorizing her family, and the Bouchard girls decide to remove an irritating problem.
7The Demon of Cults
The team investigates a young man who is being held against his will to determine if he is possessed or is influenced by a cult.
8The Demon of Parenthood
The team responds to reports of possessed toys and electronics originating from a store. David is tasked with retrieving a hidden message that may be the key to saving the prophet Grace Ling.
9The Demon of Money
The team investigates claims that a demon has been stalking people who have invested in a stock tip. The Entity asks for David's help in transitioning Grace Ling back.
10The Demon of the End
The team investigates a household terrorized by a demonic infestation. Meanwhile, Kristen is surprised to learn that her frozen egg was never destroyed and purchased anonymously which leads her on a new adventure.