The Bletchley Circle TV Review: A group of former World War II codebreakers attempt to make use of their skills in their post-war lives. In the first series we meet the ladies of Bletchley Park seven years after the end of WWII. When Susan (Anna Maxwell Martin) reads about a serial killer who has been luring young women to their deaths, she is certain she can solve the case and enlists her former Bletchley Park colleagues to assist her.