The Bletchley Circle (2012–2014)
3 user 1 critic

Cracking a Killer's Code: Part 1 

During World War Two Susan, a pattern recognition expert, mathematician Millie, information gatherer Jean and Lucy, a young girl with an incredible memory, work as code-breakers at ... See full summary »


Andy De Emmony


Guy Burt




Episode complete credited cast:
Anna Maxwell Martin ... Susan
Rachael Stirling ... Millie
Julie Graham ... Jean
Sophie Rundle ... Lucy
Ed Birch Ed Birch ... Harry
James Bowers James Bowers ... Café Owner
Matthew Cullum Matthew Cullum ... Constable Barry
Mark Dexter ... Timothy
Michael Gould Michael Gould ... Deputy Commissioner Wainwright
Elliot Kerley Elliot Kerley ... Sam
John Lightbody ... Sergeant George
Jocelyn Macnab Jocelyn Macnab ... Claire
Claire Rafferty Claire Rafferty ... Emily Dixon
Thomasin Rand Thomasin Rand ... Mary
Steven Robertson ... Crowley


During World War Two Susan, a pattern recognition expert, mathematician Millie, information gatherer Jean and Lucy, a young girl with an incredible memory, work as code-breakers at Bletchley Park. In 1952, Susan, now married, hears on the radio about a serial killer and contacts Deputy Chief Commissioner Wainwright, a wartime friend of her husband Timothy, with her theory that there will be another victim in a particular place. However the police find nothing.Susan then decides to call on her former colleagues and, under the guise of a literary club, asks them to join her in the murder investigation. They are initially reluctant until Susan proves that the killer is using a railway timetable to select his victims by plotting their journeys. By following the killer's pattern and cross-referencing information they deduce that the next victim will be Mary Lawrence and she will be murdered at Upton Park. They hurry to their destination but find they are too late. Written by don @ minifie-1

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bletchley park | See All (1) »


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Release Date:

6 September 2012 (UK) See more »

Company Credits

Production Co:

World Productions See more »
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Did You Know?


The pips are broadcast on the radio with a long last pip. The last pip was not lengthened until 1972. See more »


Millie: [while watching police activity] You were right. They're never going to find him.
Susan: No. We are.
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User Reviews

Quite Striking Detective Show
13 July 2017 | by HitchcocSee all my reviews

A group of women who worked secretly as code breakers during World War II, find each other again as a serial killer is up to five victims. He kills and the rapes them post-mortem. Of course, these women must face roadblocks all along the way, because in the late forties they are tied to husbands and treated as second class citizens. The fun thing is that each of them has a particular strength. Their significant others have no idea what they did during the war. This episode involves the parsing out of information to try to predict the next killing. Some say this is far fetched, but if they were to look at most any type of crime analysis drama, they could make the same case. A very decent opening foray.

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