The Bletchley Circle: San Francisco

Millie and Jean travel to San Francisco to join forces with two American codebreakers in pursuit of a serial killer from their war days.

The four allies work together to stop a killer who is menacing Iris' neighbourhood.

The women investigate the mysterious death of Iris's suburban friend; Millie must confront a long-lost cousin.

When a seemingly innocent man is charged with murder, the women become entangled in a suburban tragedy.

A bloodied stranger collapses on Millie and Jean's doorstep, dragging them into a mysterious criminal underworld; racing against time, the four women must unravel the patterns behind a series of attacks in order to avoid becoming the next victims.

The women seek justice on their own after uncovering a system of police corruption.

The FBI takes control of the story when a Russian diplomat dies.

A death in the Big Bop Club brings on an international incident; the women cope with Jean's disappearance.

Behind the making of "The Bletchley Circle: San Francisco," from the people and the set, to the music, filming and costumes.