British broadcaster Channel 4 and Netflix have unveiled the first look at period drama Traitors.

The spy drama, which was formerly known as Jerusalem, stars Shape of Water and Call Me By Your Name star Michael Stuhlbarg,The End of the F***ing World star Emma Appleton, Friday Night Light’s Matt Lauria and Bodyguard’s Keeley Hawes and A Streetcat Named Bob actor Luke Treadaway in the six-part series, which was created and written by Masters of Sex and Boardwalk Empire writer Bash Doran. It is directed by Dearbhla Walsh and Alex Winckler.

It’s set in the aftermath of WWII, when Britain was struggling to define itself in a new world order. Appleton plays Feef Symonds, a bold and ambitious 20-something woman who joins the Civil Service in 1945, just as Attlee’s Labour party sweeps to victory, while Lauria stars as her American lover Peter and Stuhlbarg plays fellow American and zealot Rowe. Feef agrees to spy on her own government for the Americans, who are determined to make sure England’s burgeoning Socialist ambitions don’t play into Soviet hands. Struggling to work out what she stands for, and what she’s capable of, Feef must learn to think for herself and play by her own rules at a time when knowledge becomes power and nothing and no one is what they seem. Hawes plays Feef’s exacting boss at the civil service, while Treadaway stars as a newly elected Labour MP.

LA- and London-based 42, the firm behind the forthcoming BBC/Netflix animated co-pro Watership Down, and Warner Bros’ Twenty Twenty Television are producing. All3Media International is co-funding, while Rory Aitken, Eleanor Moran, Emma Willis and Tim Carter are exec producing alongside Josh Varney and Ben Pugh as co-executive producers.

Traitors will air on Channel 4 and globally on Netflix outside of the U.K. and Ireland (and China where Netflix is not available) in early 2019.