Geoffrey Streatfeild

Tense drama series about the different challenges faced by the British Security Service as they work against the clock to safeguard the nation. The title is a popular colloquialism for spies, and the series follows the work of a group of MI5 officers based at the service's Thames House headquarters, in a highly secure suite of offices known as The Grid.

A woman (Anya Taylor-Joy, The Queen's Gambit) moves to live with her new husband in 17th century Amsterdam, but soon discovers that not everything is what it seems.