Ok, years ago, I remember seeing a badly dubbed Italian horror film on my local UPN channel. They would alway have this horror movie block on Saturdays and I tuned in. I'm trying to find out what was that Italian horror film. I want to say it's along the lines of giallo, possibly a Dario Argento or a Mario Bava film. I remember some scenes, including, one where a man and a woman explore underneath a house. Somehow a young boy plays into the film, because the last scene of the film is a close-up of this boy looking directly at the camera, smiling and he may have been missing a tooth. As if he is some sort of evil, I'm assuming. (..and it's not The Omen)

Is it Schock (a.k.a.) Beyond the Door II by Mario Bava?