The Bletchley Circle San Francisco Complete DVD   Acorn

Set during the thrilling social change of the mid-1950s, this story captures the lives of four remarkable women who previously worked as talented codebreakers during WWII. London based Jean and Millie are drawn to the Pacific Coast by a string of murders that bear remarkable similarities to that of a colleague during the war. Heading to San Francisco, they team up with Iris and Hailey to track down the murderer.

Using their skills to investigate murders overlooked by the police, the intrepid foursome delve into the mysterious death of a friend; get caught up in an underworld of secret; and become embroiled in a dangerous KGB plot. But can they survive the shattering consequences of coming face to face with their darkest, most calculating foe?