The Bletchley Circle (2012)

In the throes of WWII, the unsung heroes of Bletchley Park wage a silent war, meticulously decoding the cryptic messages of the German military. Among them is Susan, a prodigious codebreaker whose talent transcends the confines of war, persisting into her post-war life as a mother and housewife. Encased in mundane domesticity, Susan's keen intellect continues to detect patterns woven into the fabric of everyday life. But when a chilling string of brutal murders sends shockwaves through London, Susan's skills are tested in a terrifying new arena. She perceives a sinister pattern in these killings, a cryptic code in the bloodshed. When her fears for an overlooked victim are dismissed by the police, she knows she must intervene. Confronted with a puzzle that threatens to claim more lives, Susan reaches into her past, reassembling her formidable team from Bletchley Park. Millie, Lucy, and Jean - each a maestro of codebreaking in their own right, are thrust back into the thrilling world of clandestine patterns and secret codes. As the shadow of the killer looms closer, they find themselves locked in a race against time, trying to decipher the murderer's cryptic pattern before he strikes again.

The Bletchley Circle is a crime show featuring Rachael Stirling and created by Guy Burt.

The Bletchley Circle is currently streaming for free (ad-supported) on FILMRISE, Freevee, Peacock, Peacock Premium, Plex, Plex Player, Pluto TV, The Roku Channel and Tubi TV.