Amid a growing constitutional crisis, the staff scrambles to stage an impromptu inauguration, while Hal exploits the chaos behind the scenes.

Kate weighs a compelling offer. Eidra faces scrutiny over fallout from the Roylin debacle. Stuart pitches a proposal that goes far deeper than policy.

As the nation pauses to mourn, Grace considers the framework of her administration. Private strain threatens Kate and Hal's polished public image.

Kate's unique role grants her access to anyone she wants - except the one person she needs. Dennison puts actionable intelligence to personal use.

Forced to play the perfect couple, Kate and Hal confront a looming problem in international waters and a development that could torpedo U.S. credibility.

At an emergency strategy session, Grace weighs unthinkable choices, while Kate rolls the dice on a gamble that could alter the course of history.

Sequestered inside Winfield House as embassies go on alert and allies fall silent, Kate and Callum race to contain a potential disaster.

Kate must use all her leverage and political instincts to avert a catastrophe at a high-stakes summit - with the fate of nations hanging in the balance.