Just that morning, she said she told her husband about her suicidal thoughts. “I was ashamed to say it,” she told Winfrey, “ashamed to admit it, but I knew If I didn’t say it, I would do it.”

Harry, she said, cradled her and, over time, began to formulate a plan to ease the pressure and ensure that the tragedy that had engulfed his mother, Princess Diana, would not repeat itself.