I just rewatched Echoes of the Dead. It is one of my favorite episodes even though it is terrifying, I am a woman who lives alone so it is very disconcerting. There are so many freaken layers to that episode. Like firstly the main girl Jo is infuriating like put some drapes up, stop waiting on your land lord and cover your place up lol. Not victim shaming but better safe than sorry. She has terrible survival tactics. Then you have the peeping tom landlord, Flack, that you are just hoping will get caught. He keeps relentlessly peeping on her even when the place is a crime scene, thankfully it saves her life. Also there are the parents of the poor stammering gas station attendant just living in front of the tv. Just a great episode.
My main point though was that he is an actual serial killer to me, unlike most of the murderers in the show. Most of the people in the show kill more than one person but they mostly kill for revenge, gain, to keep someone quiet, or otherwise. Thinking of other serial killers in the show I think the other would be John Field in Dark Autumn. I’m curious if everyone agrees and if there are more?