Set against the backdrop of the 'Manhattan project', scientists, and their families, navigate a world of secrets and lies.
Set during WWII in Los Alamos, New Mexico, scientists Frank Winter and Charlie Isaacs compete to create the world's first atomic bomb.
Frank tries to save his team, leading to serious consequences. Meanwhile, the scientists' wives find creative ways to survive life on the Hill.
The community is in shock after losing one of their own, while the scientists find their work is compromised by new security measures.
The arrival of a high-profile guest shakes things up on the Hill, while Frank finds himself haunted by the past.
When Babbit's past comes back to haunt him, Frank tries to protect his mentor - resulting in an argument with Charlie.
Frank searches for medical answers, while Charlie and Helen go on a trip to survey an off-site reactor.
Helen and Charlie try to solve a crisis at the reactor, while Frank and Liza help Paloma's family. Abby begins a journey of self-discovery.
The scientists face serious questions about the future of their projects. Charlie and Theodore make a distressing discovery, while Frank tries to recruit new members to his team.
Charlie and Frank are forced to work together for the good of the project, but soon encounter a problem.
The scientists' wives explore their inner desires, while Frank finds an unusual solution to an ignition problem.
An overseas development reinvigorates the hunt for a spy on the Hill. Charlie and Abby make a sacrifice when the plan with Frank is threatened.
Akley becomes vulnerable when he tries to fix Thin Man's shortcomings.
Frank is given a life-changing opportunity, while Charlie finds himself in the US Army's hotseat.