"Fairies in the beck!"

We've got a very non-spooky episode to get y'all gently primed for Spooky Season. Scotty gives a very quick primer on the history of "spiritualism," and then tells Amelia about how one of the movement's most famous adherents--Sir Arthur Conan Doyle--allowed himself to be adorably hoodwinked by a pair of quite imaginative young girls.

Yes, this is the story of the Cottingley Fairies.