A drama about the clandestine race to build the world's first atomic bomb in Los Alamos, N.M., centers on a self-destructive professor who is commissioned to help lead the Manhattan Project in the series opener

Frank attempts to save his team, and pays the price; at the same time, the wives get creative trying to make life on the Hill more interesting

The loss of one of their own leaves the community reeling; and new security measures interfere with the work being performed by the scientists

The arrival of a high-profile guest shakes things up. Frank is haunted by his past

Frank clashes with Charlie to protect Babbit, who has become the subject of an investigation

Frank seeks medical answers; Charlie and Helen travel to survey an off-site reactor

Helen and Charlie deal with a crisis; Abby embarks on a journey of self-discovery

Both Charlie and Frank face serious questions as to the future of their projects

Frank and Charlie hatch a plan

An unexpected visitor arrives on the Hill

A development overseas re-invigorates 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 offered a life-changing opportunity. At the same time, the U.S