The Bletchley Circle and Communication Technology

  Halfway through the second episode, Susan, Lucy, Millie, and Jean attempt to track down neighbors or relatives that know their suspects.  Susan and Millie discover a potential suspect, Gerard Wiggins, matches who they think the killer is: someone who has authority on the train way, and someone how knows routes by heart.  However, they learn Wiggins has a brain injury that has severely impacted his intelligence.  When the women finally meet up later, they learn that Wiggins was taken into custody as the police found evidence in his train station locker.  Susan claims he could not do this.  Knowing what they know now, Wiggins is simply a scapegoat for the killer and is not smart enough to kill in the pattern/way the killer does.  As the group think about their next move, they remember the victims.  All the victims were pretty young women.  The group decides to take a risk--they want to use Lucy as bait for the killer on his most common train ...

  The second episode of The Bletchley Circle opens on a somber note.  The victim Susan and her friends found at the end of the last episode is receiving a public funeral.  Susan attends this and as she listens to the eulogy, she reflects on what she has gotten herself into.  At the same time, her friends were wanting to back away from the investigation but now changed their mind after finding the victim.  They are all motivated to continue their search for the killer.  Now that they correctly predicted the location of the fifth victim, they believe they are on the right track to finding out the killer's identity. Back at their meeting spot, the women start to narrow down their list of suspects to seven men.  In the last episode, they figured that the victims would not leave with any normal man--the man would have to have some sort of authority in order to lure them away from the trains.  Thus, they expect the killer to work on the railways.  ...