Source
Set during the thrilling social change of the mid-1950s, The Bletchley Circle: San Francisco captures the lives of four remarkable women gifted with extraordinary intelligence, breathtaking capacity for pattern recognition, and a genius for decryption.
Years after secretly serving during WWII as code-breakers, they turn their skills to solving murders overlooked by the police. Starring Julie Graham and Rachael Stirling from the original The Bletchley Circle series.