This interview contains spoilers from all six episodes of "Zero Day," now streaming on Netflix. Lizzy Caplan always knew that her character, Congresswoman and former First Daughter Alexandra Mullen, was behind the catastrophic cyberattack that incited the existential and moral panic that runs through "Zero Day.

Angela Bassett, Joan Allen, Connie Britton, Jesse Plemons and Lizzy Caplan co-star in a series about politicians trying to find answers after a deadly cyberattack.

Sure, some unknown party has managed to seize control of every connected device in the United States, turning all of them off just long enough to cost thousands of lives, and leaving behind an ominous push alert that “This Will Happen Again.