A sceptical female psychologist joins a Catholic priest-in-training and a blue collar contractor as they investigate the church's backlog of unexplained mysteries.
Kristen uncovers Leland's sinister plan involving her ovum. Sheryl's role escalates the mother-daughter conflict. (S4, ep 1)
Kristen, David and Ben investigate a suspected werewolf attack. Andy deals with unexplained trauma. (S4, ep 2)
Potentially demonic pork products lead Kristen, David and Ben to a pig farm to investigate. (S4, ep 3)
A couple seeking an exorcism are plagued by a demon that takes away the ability to speak clearly and its influence spreads to the team. (S4, ep 4)
Kristen, David and Ben travel to the Vatican with a possible relic from Jesus' cross. (S4, ep 5)
A possibly-possessed dancer leads Kristin, David and Ben to a dance troupe. Sheryl reaches her breaking point with Leland. (S4, ep 6)
How to Dress a Wound: Ben and David ride along with a train engineer convinced he's being haunted on the tracks, while Kristen cares for her mother. (S4, ep 7)
Through remote viewing, David stumbles into the life of a man contemplating murder-suicide and the team rushes to find him. (S4, ep 8)
David, Kristen and Ben investigate a company using AI to fake communication with the dead. (S4, ep 9)
Hurricane Warning. A storm is approaching. Kristen must protect her family. Sheryl and Leland's war peaks. (S4, ep 10)
The team receives disappointing news; Kristen meets mysterious stranger Ellie, who claims to be an old friend of Sheryl's. (S4, ep 11)
Sister Andrea gives the team their last assessment, a man who believes his doppelganger has possessed him and has a personal connection to the nun. (S4, ep 12)
The Vatican asks the team to investigate a Hawking-like genius for potential ties to the occult. (S4, ep 13)
An ominous countdown begins after the Bouchard girls start a new game on their VR goggles. The Entity moves to stop the Sixty. (S4, ep 14)