Based on the lives of four women who worked at top-secret HQ Bletchley Park during World War II, The Bletchley Circle launched on ITV last September.

> Order Series 2 on DVD on Amazon.

Anna Maxwell Martin, Rachael Stirling, Sophie Rundle and Julie Graham will all return for four new episodes, with Hattie Morahan joining the cast as a former Bletchley Park colleague.

Written by series creator Guy Burt, Series 2 will feature two self-contained stories each played out across two 60-minute episodes.

Executive producer Jake Lushington teased: “In this series as well as unlocking the sinister forces at work in 1950’s Britain, Susan, Millie, Jean and Lucy are attempting forge their own place and identity as women in that era. The combination of these heroic women’s personal stories and a compelling period thriller has already marked itself out as a winning combination both in the UK and internationally, with its recent US Premiere garnering rave reviews from the American press.”

> Buy Series 1 on DVD on Amazon.

Are you looking forward to Series 2? Let us know below…