 During auditions, a "Miracles" producer learned that Ulrich had been sent the script by his agents and managers, and that he had "really responded to it".Matt Reeves, the director of the pilot, was impressed that he was able to exude soulfulness, emotion, and intelligence without speaking.Hatem said that when casting the part of Alva Keel, a mysterious person was necessary for the role, "someone who would draw Paul away from the Church and bring him into this strange world of paranormal investigation".