The series premiered on September 26, 2019, on CBS, before moving to Paramount+ for subsequent seasons. It features an ensemble cast led by Katja Herbers, Mike Colter, and Aasif Mandvi as three individuals from vastly different backgrounds who are tasked by the Catholic Church to investigate possible supernatural incidents. The series was produced by CBS Studios and King Size Productions and filmed in Astoria and Brooklyn in New York City.
Skeptical forensic psychologist Dr. Kristen Bouchard (Herbers), Catholic seminarian David Acosta (Colter) and skeptical technology contractor Ben Shakir (Mandvi) are hired by the Catholic Church to investigate purported supernatural events. The three find their personal lives increasingly intertwined with such events.