The Bletchley Circle is a 2012 television mystery drama miniseries, set in 1952, about four women who used to work as code-breakers at Bletchley Park.

With an extraordinary flair for code breaking and razor-sharp intelligence skills, four seemingly ordinary women become the unlikely investigators of a string of grisly murders in this original thriller, set against the backdrop of post-war London.

It's 1951 and Susan, Millie, Lucy and Jean have returned to post-war domesticity, modestly setting aside the part they played in the Allied victory. Their brilliant work at top security HQ Bletchley Park helped crack the codes used by the German military, producing crucial intelligence that shortened the war. Susans conventionality masks a sharp, inquisitive mind. She may appear every inch the typical 1950s wife and mother, but when she hears about a string of unsolved murders in London, Susan's old Bletchley spirit is ignited. Unaware of her background, the police dismiss Susan's theories causing her to realise that the only way she can solve the murders is with the help of her friends.

A race against the clock ensues as the women work to outwit the culprit. Can they rekindle their singular expertise and discover the killer's next move before he strikes again?

Reviews

“With its fine acting, tight script, and tense tone, The Bletchley Circle is pure ecstasy for mystery fans.” Philadelphia Inquirer

“Perfectly cast and cleverly paced, consider it a mini-"Masterpiece Mystery” for that franchise’s crime-loving loyalists." – Variety

“The Bletchley Circle is a decent little mixture of history and mystery. Viewers get an interesting peek at an underexplored era of British history with the Bletchley Park connection and the early fifties setting, while the serial killer aspect is handled without recourse to modern forensic techniques. Fans of British mysteries and contemporary television will want to give this set a look.” – DVD Verdict