The Bletchley Circle poster

TV series

The Bletchley Circle

2012TV-142 seasons7.6 / 10

The Bletchley Circle follows the journey of four ordinary women with extraordinary skills that helped to end World War II. Set in 1952, Susan, Millie, Lucy and Jean have returned to their normal lives, modestly setting aside the part they played in producing crucial intelligence, which helped the Allies to victory and shortened the war. When Susan discovers a hidden code behind an unsolved murder she is met by skepticism from the police. She quickly realises she can only begin to crack the murders and bring the culprit to justice with her former friends. The Bletchley Circle paints a vivid portrait of post-war Britain in this fictional tale of unsung heroes.

Streaming, rental and purchase options

Where to watch in United States

Checked Jul 22, 2026

The Bletchley Circle is available to stream on Britbox, Britbox (Via Amazon Prime), Peacock, Peacock Premium, Prime Video, Amazon Freevee, Fawesome, Pluto TV, The Roku Channel, Tubi, and YouTube in United States. You can also buy it from Amazon, Apple TV, and Fandango at Home. Use the direct links below to open the provider.

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Synopsis

The Bletchley Circle follows the journey of four ordinary women with extraordinary skills that helped to end World War II. Set in 1952, Susan, Millie, Lucy and Jean have returned to their normal lives, modestly setting aside the part they played in producing crucial intelligence, which helped the Allies to victory and shortened the war. When Susan discovers a hidden code behind an unsolved murder she is met by skepticism from the police. She quickly realises she can only begin to crack the murders and bring the culprit to justice with her former friends. The Bletchley Circle paints a vivid portrait of post-war Britain in this fictional tale of unsung heroes.

Season 2 episodes

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← Season 1

Episode 1

Blood on Their Hands (1)

45m7.2 / 10

Former Bletchley Park worker Alice Merren is in prison awaiting trial for the murder of the eminent scientist John Richards. Driven by her belief in Alice's innocence and that she is hiding the truth about John's death, Jean attempts to regroup the circle in order to help establish the innocence of one of their own.

Episode credits

Directed by Jamie PayneWritten by Guy BurtGuest stars Anna Maxwell Martin, Mark Dexter, Simon Chandler, Paul Ritter, Paul McGann, Jonathan McGuinness, Joanne Adams, Victoria Carling

Where to watch The Bletchley Circle

Episode 2

Blood on Their Hands (2)

45m7.1 / 10

Following the discovery of Lizzie Lancaster's true identity, the women face a race against time to prove Alice's innocence and save her from the hangman's noose. However, subsequent investigations lead to the discovery of a much darker military conspiracy.

Episode credits

Directed by Jamie PayneWritten by Guy BurtGuest stars Anna Maxwell Martin, Mark Dexter, Simon Chandler, Paul Ritter, Tim Pigott-Smith, Simon Darwen, Joanne Adams, Mabel Watson

Where to watch The Bletchley Circle

Episode 3

Uncustomed Goods (1)

45m7.2 / 10

Spirited Millie is earning a bit of money selling odds and ends on the black market. But Millie stumbles across a seam of post-Second World War unwholesomeness when she annoys some very dangerous people and gets into trouble. Soon, the other Bletchley girls must rally to her aid.

Episode credits

Written by Guy BurtGuest stars Alexander Perkins, Hermione Gulliford, Rob Jarvis, Edyta Budnik, Orestis Sophocleous, Brana Bajic, Nicholas Asbury

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Episode 4

Uncustomed Goods (2)

45m7.1 / 10finale

Lack of action by the police leaves the women to conclude there must be corruption within the vice squad and that catching the gang red-handed is their only option. Plotting to infiltrate the crime ring to find out the location of the hotel being used as a base, they visit Marta in her restaurant, pretending Jean is a potential new client. This leads to an opportunity for Lucy to memorise the businesswoman's ledger, which may hold the key to the whole operation.

Episode credits

Directed by Sarah HardingWritten by Guy BurtGuest stars Edyta Budnik, Orestis Sophocleous, Brana Bajic, David Hounslow, Iain Stuart Robertson, Rupert Holliday-Evans, Michael Webber

Where to watch The Bletchley Circle

Episode information updated Jul 23, 2026

More about The Bletchley Circle

Cast

Rachael StirlingMillie
Julie GrahamJean
Sophie RundleLucy
Anna Maxwell MartinSusan
Nick BloodBen Gladstone
Ed BirchHarry
Michael GouldDeputy Commissioner Wainwright
Mark DexterTimothy

Credits

Created by
Guy Burt
Written by
Guy Burt

Production details

Status
Ended
Series type
Scripted
Episodes
7
Original language
English

Networks & production

  • ITV1United Kingdom
  • World ProductionsUnited Kingdom

Themes

1950sapprovingbritish armybrutal murderchemical warfarechemical weaponchemical weaponscode breaking