An intimate epic set in 1945 London, “Traitors” is the dangerous, enthralling story of Feef, who is seduced by a rogue American spy into spying on her own country. Her task? To uncover a Russian agent in the heart of the British Government.

Earache’s superb Keeley Hawes is Priscilla Garrick, a senior civil servant at the Cabinet Office. She has worked hard to be taken seriously, and isn’t afraid of sticking her neck out – especially when it comes to promoting women’s rights in the workplace.

And the fantastic Jamie Blackley is Freddie Symonds, Feef’s brother. The Symonds family is deeply dysfunctional, and Freddie – who everyone suspects is “a homosexual” – has been persuaded into marrying a woman for her money so his parents can fund their crumbling country mansion…

Don’t miss Keeley and Jamie in “Traitors”, Sundays at 9pm, Channel 4