The Bletchley Circle

The show is a drama series that follows four fictional former Bletchley Park operatives as they team up to solve a series of murders. The ensemble cast includes Anna Maxwell Martin, Rachael Stirling, Julie Graham and Sophie Rundle. All four lead actors portray the ex‑Bletchley Park investigators.

The programme is a drama presented in an episodic format, centred on a quartet of fictional former Bletchley Park operatives. It is billed as a series that follows these characters as they apply their wartime skills to contemporary investigations, with each instalment offering a self‑contained story. The core narrative follows the four ex‑codebreakers as they band together to tackle murder cases. Drawing on the analytical abilities they honed at Bletchley Park, the group works as a team to uncover clues and bring perpetrators to justice. Their shared background provides a distinctive approach to solving the crimes they encounter. The cast comprises Anna Maxwell Martin, Rachael Stirling, Julie Graham and Sophie Rundle, each portraying one of the former intelligence officers. Their performances bring the ensemble of former wartime analysts to life, giving the series its distinctive character dynamic. The show blends elements of historical reference with modern detective work, offering viewers a look at how the legacy of Bletchley Park might be imagined in a contemporary setting.