In 1992, BBC apparently had an Orson-Wells-style Halloween hoax. It has moments of creepiness, but it didn't build as I'd hoped.
What is interesting are the participants/actors who are struggling to contain laughter, which leads to near perpetual smirks. The doctor keeps hiding her mouth.
I half-suspected the hoax to be a hoax--people traumatized as a result of watching it. Apparently so, if Wiki can be believed.
Here's the wiki entry. This reveals the most fun part: Find the "ghost." I'm afraid I didn't see or experience any of the ghost's secret appearances except for one. It might have been more chilling had they let those appearances last longer than they did. Too subtle for my eyes to register, anyway. Still, it's a fun hide-and-go-seek.