The Bletchley Circle: Cracking a Killer's Code, Part 3 Season 1, Ep 3
Thinking she knows the identity of the killer, Susan returns with the police, only to find him gone. [more inside]
I liked The Bletchley Circle enough to want to talk about it, so I submitted it and it's been approved. I'll be posting the first episode next week unless someone else is really motivated and beats me to the punch.