A new era is ushered in with the first test of an atomic weapon.

Frank discovers the real reason he's been taken captive.

The scientists and the Army battle for control of the bomb.

Days before the world's first nuclear explosion, everyone races to secure their place in history.

Oppenheimer puts Charlie in a precarious position.

Charlie is forced into a new leadership role in the race to build the world’s first atomic bomb.

Liza faces off against Darrow as Abby learns a secret about Oppenheimer.

Frank attempts to navigate his new place on the Hill.

The hunt for a Soviet spy turns deadly.

As the project falters, Charlie turns to an unlikely partner for help.