I watched this episode last night, and apart from what's been said in all the interesting posts above, one of the first things I noticed was how unfriendly some of the people of the Scottish town were in this episode. the girl's father was very rude, Willie was weird and spooky, and the worst one of all IMO was the old lady housekeeper. She was downright scary and over the top rude.

Usually, I never feel sorry for the criminal in a story, and if it wasn't for Mrs Bastion killing her own dog or Willie, I would have had more compassion for her. Her husband was not only boring, unattentive and clueless, but he also had a roving eye when it came to his secretary. Though he was the target for murder in this episode, I couldn't care less about his safety. I know lol my bad :smt003
I thought of Sherlock Holmes Hound of Baskerwille when watching this episode.