In one of the 10th Doctor's episodes, "The Idiot's Lantern", victims, including Rose(
) lost their faces. If you had a method to give an actor or prop a smooth, featureless, eyeless face, that would be creepy even for those who don't know the show.
Autons would be good props too, just make them with mannequins.
If you had the space and the right child actor, you could put a TV playing Dr. Who episodes or just static, and a couch in front of it with a child hiding behind the couch. When guests enter the kid darts from behind the couch, and a monster gives chase, maybe dragging the kid through a false wall. "Hiding behind the sofa" is an iconic part of the classic Who viewing experience for those who grew up with it.