I take part in role-playing events called "House Games." Lest anyone start thinking TOO MUCH INFORMATION allow me to point out these are role-playing games a la Dungeons and Dragons (but not that one, nor even in that genre).
Last Sunday I ran a game--a one-shot for five players--based on Dark Shadows. Okay, the town was called Noah's Cove and the place where they spent their time was based the House By The Sea (which I called Cliff House) but it did involve Caleb Collins. They even opened up Caleb's grave to get a key he still had in hand! This key opened a secret door which led to a mystical labyrinth. Although they didn't know it, part of the 'back story' involved Parallel Time of 1860, when Bartholomew Collins (Jonathan Frid) became a vampire and followed his childhood love Jerusha Stokes (Lara Parker) into 'our' time. Heh heh.
Just wanted to share.