Watch The Demonologist (2019) full hd online Directed by J.M. Stelly. With Brian Krause, Lara Grice, Jared Bankens, Manon Pages. Detective Damien Seryph investigates a string of murders that connects to a group trying to bring forth the 4 King Demons of Hell. Damien’s past connects him to those involved and will force him to become "The Demonologist".