The Bletchley Circle

The Bletchley Circle is a series that follows the lives of four women who worked together at Bletchley Park during World War II, deciphering German military codes for the British military. The story takes place in 1952, seven years after the war's end, when Susan Gray, Millie Harcourt, Lucy, and Jean McBrian have returned to their ordinary lives. Susan, who is now a housewife and mother, becomes aware of a series of murders in the London area and recognizes patterns connecting the killings. She decides to return to her codebreaking past and enlists the help of her former colleagues to investigate the crimes. As they all signed orders of secrecy about their work during the war, the two married women disguise their activities from their husbands as a book club. The series contrasts the conventional but very different lives of the four women and the sense of usefulness they felt while codebreaking during the war. In the Series 1 finale, the women are forced to confront the man they suspect to be the killer.

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Some TV shows that have similar genres and were produced around the same time as The Bletchley Circle include The Crow Girl, High Potential, Devil in the Family: The Fall of Ruby Franke, Evil, True Detective, Sharp Objects.