I remember seeing this when I was a kid. Aired on KPTV in Portland Ore.  A country estate with a small graveyard. In the graveyard there was an entrance to a Subterranean cavern which housed several altars. Each painted with a large Red letter A. Cult members worshiped Asmodeus.  Had a Hammer Film feel to it.

I’ve never been able to track it down. I even tried looking through some of the old schedules ( had a friend that worked at the TV station at one time ). It seems as many of those records were tossed… as were several old tapes/film reels.

I really want to find this film. I hope you can help.  – Shawn