Manhattan

Helen and Charlie deal with a crisis at the reactor; Abby begins a journey of self-discovery; Frank and Liza help Paloma's family.

In this episode, Charlie is forced into a new leadership role in the race to build the world's first atomic bomb.

Frank finds out the real reason he's been held captive all this while.

Liza confronts Darrow after discovering some shocking news, and Abby finally learns a shocking secret about Oppenheimer.

Frank's situation improves with unexpected aid, while Oppenheimer's private life has an unforeseen impact on the project.

After a long period of incarceration, the prison releases Frank, and he can return to the Los Alamos research site; Frank tries to navigate his new place on The Hill.