Years after secretly serving during WWII as code-breakers, four remarkable women gifted with extraordinary intelligence use their skills to solve murders overlooked by police.
EPISODE 1
Presidio
When she learns of a woman’s recent death that chillingly resembles the murder of a wartime colleague, Millie persuades her friend Jean to travel to San Francisco. There they meet Iris and Hailey — their American code-cracking counterparts.
EPISODE 2
Wake
Millie, Jean, Iris, and Hailey continue their complex investigation that has spanned two continents, but can they crack the codes before the killer hits close to home?
EPISODE 3
Charlotte's Web
Our four women delve into the mysterious death of Iris's suburban friend, uncovering a complex cluster of marriages built on lies and deception. In her quest to forge a new life, Millie must confront a long-lost cousin, who may hold the key to a future in San Francisco.
EPISODE 4
Madhouse
After a seemingly innocent man is charged with murder, the women become enmeshed in a tangled suburban tragedy, racing to find both the true killer and the methods before the scent goes cold. Jean meanwhile grapples with how - and where - to build a new life for herself.
EPISODE 5
Not Cricket
A bloodied and battered stranger collapses on Millie and Jean's doorstep, dragging them into a mysterious criminal underworld. In a race against time, the four women must unravel the patterns behind a series of attacks in order to avoid becoming the next victims.
EPISODE 6
Iron in War
Having uncovered a covert system of police corruption, the women must go it alone, crafting a complex sting operation in order to draw out two warring factions and see justice done. Time is precious, as their investigations have triggered deportation proceedings that could soon send Jean and Millie back to the UK.
Crystal Balint
Rachael Stirling
Julie Graham
Chanelle Peloso
Jennifer Spence
Peter Benson
Gary Harvey
Michael MacLennan
Brian Hamilton
Jake Lushington
