Samuel learns the truth about the Shaws and the MI5 men. His is invited to an extraordinary secret meeting, while Hannah becomes increasingly worried about her father’s safety.
After the shooting, Field places the Petruhkin home and factory under protection. Samuel makes his own plans and goes into hiding where he meets Kathleen in secret.
Samuel spies on his new friends while his relationship with Kathleen intensifies. Hannah and Kathleen investigate Anthony’s disappearance.
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.