What does the ending mean, and what can we expect from a fifth season?

A lie, a disastrous dinner, and an increasingly authoritarian president push Kate to her breaking point

The threat of war forces Kate to confront her own complicity in America’s increasingly dangerous decisions

Todd Penn complicates Kate’s life as Britain’s new prime minister takes a stand against the United States

Dennison’s death triggers a political crisis and reveals the British prime minister’s most vulnerable side

In “Redcoats,” the attack on Grace makes Hal acting president and puts the Wylers’ marriage to the test

In “Windsor,” Season 4 opens with an international betrayal, a marital crisis, and an assassination attempt that changes everything