Thanks! I know Joan Bennett particularly enjoyed the costume drama storylines, and the rest of the cast loved hearing her Hollywood stories. As the show went on, the writers ran through various supernatural storylines and time periods (and even alternate realities), as the relentless five-day-a-week schedule demanded. They pillaged Lovecraft and Henry James and du Maurier. When they introduced the character of Quentin Collins (partly to give Jonathan Frid some relief from the constant front burner), he started out as a malevolent ghost controlling two children, a la The Turn of the Screw; at other times he was a werewolf, a zombie, and a romantic antihero. The show became more and more convoluted until it was canceled in 1971.

Towards the end of the show's run, Dan Curtis made two feature films, House of Dark Shadows and Night of Dark Shadows. They are visually beautiful but completely lacking in the charm that the TV show possesses. House of Dark Shadows, especially, is nihilistic in a sub-Hammer vein; Barnabas is a much more purely brutal character, and almost the entire cast gets vamped and/or killed off!