Samuel, a Russian-born Jewish inventor who specialises in the development of hearing aids, is tasked with a secret mission by MI5 to use his technological expertise to contribute to western Cold War efforts. Following the tensions of the space race and the first hydrogen bomb test, Samuel's efforts factor in to the emergence of the modern world.

Toby Stephens
Samuel Petrukhin

Keeley Hawes
Kathleen Shaw

Linus Roache
Richard Shaw

Mark Bonnar
Field

Lucy Cohu
Miriam Petrukhin

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During the tumultuous summer of 1958, Samuel prepares to launch his new invention, which is attracting some suspicious followers, before meeting the mysterious Kathleen.
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