The Bletchley Circle Spin-Off!
The original The Bletchley Circle series followed a group of four
female codebreakers at the famous World War II code-breaking center
Bletchley Park, who went on to use their skills to investigate a series
of complex crimes.

The Bletchley Circle: San Francisco
will be on BritBox – and ITV in the U.K. – later this year. It will
follow two of the original lead characters, Millie (Rachel Stirling) and
Jean (Julie Graham), as they travel to 1956 America and join forces
with two U.S. codebreakers to tackle a string of murder cases. (x)