After a hostile attack on a British vessel, seasoned diplomat Kate Wyler assumes a new role in the UK that puts her skills — and marriage — to the test.

At Winfield, President Rayburn's plans in the Gulf have the staff on edge as tensions between a determined Hal and a strong-willed Kate come to a head.

After a sit-down with a Russian ambassador leads to new intel and mixed messages, Kate takes a trip to the Oval Office and reconnects with an old friend.

After rushing back to London, Kate shares her suspicions about the bombing. The search is on for Lenkov — and Roylin. Eidra delivers devastating news.

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.