Kate proposes a unique solution to the Roylin problem. A risky plan unfolds at the prime minister's event in Scotland. Stuart confronts his feelings.

Vice President Grace Penn arrives in London with an agenda — and advice — as fallout from Roylin's bombshell affects Kate's relationship with Trowbridge.

Kate puts her best foot forward after pillow talk with Hal forces her to face hard truths, and Vice President Penn offers a blunt lesson in geopolitics.