DC Showcase: Constantine – The House of Mystery: Directed by Matt Peters. With Matt Ryan, Ray Chase, Robin Atkin Downes, Grey Griffin. Occult detective John Constantine is trapped in the House of Mystery, a secret domain where none can escape from. John Constantine wakes up in the eerie House of Mystery with no recollection of how he got there. Fortunately, Zatanna and his friends are all there. Unfortunately, they have a bad habit of turning into demons and ripping him to shreds, over and over again!