ITV has released the first trailer for the new Bletchley Circle spin-off.
Set in the early 1950s, ITV’s mystery drama series launched in 2012 and aired on PBS in the US.
The Bletchley Circle told the story of four women who worked as codebreakers at Bletchley Park.
In February, four years after the show was cancelled, US streaming service Britbox announced plans to revive the series with its its first original commission, The Bletchley Circle: San Francisco.
Set in 1956, the four two-part standalone stories will feature two of the original lead characters – Julie Graham as Jean and Rachael Stirling as Millie – in America as they join up with two American codebreakers to investigate a string of new murder cases.
Watch the trailer:
The first two seasons of The Bletchley Circle are available to buy on DVD on Amazon now.
The Bletchley Circle: San Francisco will premiere later this month on BritBox in the US and on ITV in the UK.