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
• Keeley Hawes
• Linus Roache
• Mark Bonnar
• Lucy Cohu
• Claire Bloom
• Lily Sacofsky
• Timothy Spall