A new threat creates further unrest across the nation. As he narrows in on the culprit, Mullen is faced with an agonizing decision.
A personal tragedy reopens old wounds for the Mullen family. Speaker Dreyer pushes for a change in leadership. Sheila testifies before Congress.
Mullen’s initial arrests draw blowback from the public — especially TV pundit Evan Green. Alex faces pressure to investigate her father.
Mullen’s commission investigates a hacking ring. President Mitchell weighs retaliation. A powerful figure has demands for Roger.
