Patti, you must mean "false Dark Shadows memory syndrome." There are still some scenes I'm convinced I saw that just aren't there.
The screen capture that is displaying for me from house of Dark Shadows is captioned with a quote of dialogue from Jeff Clark, who was indeed portrayed by Roger Davis. However, onscreen is a character portrayed by Paul Michael, also known to fans of the original series as KING Johnny of the gypsies. As in "Magda, you lyingk geeeep-seeee!" I forget if the character has a name. In the scene, he's giving Jeff a message from Roger & Prof. Stokes, and Jeff, who's just woken up from a nap, is asking when Paul Michael's character saw Roger & Stokes.
Best, Steve