‘Restless‘ part 1 airs, Thursday 27 December at 9.00-10.30pm on BBC One.

What becomes of your life when everything you thought was solid and certain about it turns out to be a fantastically complicated lie?

This happens to Ruth Gilmartin (Michelle Dockery) when, one day in 1976, her mother Sally (Charlotte Rampling) suddenly tells her she has been living a double life. She is not respectable Sally Gilmartin but in fact Eva Delectorskaya, a spy for the British Secret Service who has been on the run for 30 years.

Eva’s story begins in Paris in 1939. Eva (Hayley Attwell), a beautiful Russian émigrée, is recruited for the British Secret Service by Lucas Romer (Rufus Sewell), a mysteriously alluring Englishman. As Romer trains Eva to become the perfect spy their love affair begins.

Hayley Atwell plays Eva Delectorskaya and Rufus Sewell plays the younger Lucas Romer while Michael Gambon plays the older Lucas Romer. Michelle Dockery plays Ruth Gilmartin and Charlotte Rampling plays her mother Sally Gilmartin.

‘Restless’ is written by William Boyd, directed by Edward Hall and produced by Hilary Bevan Jones and Paul Frift. The executive producers are Matthew Read for BBC, Christian Vesper for Sundance and William Boyd. ‘Restless’ is an Endor Production for BBC and Sundance Channel.

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© BBC/Endor Productions