The Atomic City

A brilliant physicist in Los Alamos who is deeply protective of his family. He wrestles with whether to inform authorities or act quietly to safeguard his son, and his decisions propel the investigation forward. His calm, strategic mindset helps him navigate escalating danger as the case unfolds. He ultimately confronts the kidnappers to locate Tommy.

Tommy's mother, intensely protective and practical. She weighs the risks of involving the authorities against immediate danger to her child. Her steadfast resolve supports Frank and anchors the family under pressure. She champions safety and decisive action when the situation grows dire.

A curious and spirited boy who is abducted during a carnival. His resourcefulness surfaces as he hides and survives the ordeal, becoming the emotional center of the pursuit. Tommy's presence motivates his parents and the FBI to intensify the search.

Tommy's teacher and a conduit of concern, she informs and supports the pursuit through her relationship with FBI agents. She provides a human perspective on the danger facing the community. Ellen's involvement helps bridge civilian life with the investigation.

An FBI agent allied with Ellen Haskell's concerns, he tails the Addison family and coordinates surveillance efforts. He embodies the determined, procedural side of the response to the kidnapping. Farley's persistence drives key investigative leads.

A seasoned investigator who collaborates with Farley and the FBI to manage the case. He stays steady under pressure and focuses on coordinating the pursuit across locations. Mann's pragmatism helps steer the operation toward a safe resolution.

The mastermind behind the plot, a physicist who analyzes the mailed file and orchestrates the danger to Tommy. He underestimates the moral and practical implications of his actions. His eventual arrest marks the turning point in the chase.

A small-time crook with Communist ties who becomes a pivotal link in the pursuit. He is manipulated by Rassett and becomes a casualty of the investigation when he is identified by surveillance. Clark's role highlights the era's paranoia and the danger of false leads.

A dedicated FBI agent who works alongside colleagues to trace the envelope and monitor film footage. Weinberg contributes to the rapid dissemination of information and the escalation of the manhunt. His presence reinforces the government-led response to the crisis.