William, Prince of Wales, and Prince Harry, Duke of Sussex, are going to have a “quite uncomfortable” time watching the fifth and sixth seasons of The Crown, the British royal expert and author Katie Nicholl recently explained to Entertainment Tonight.

According to Nicholl, who recently sat down with ET to discuss the upcoming season of The Crown, the fifth and sixth season of the popular Netflix series is going to cover some of the most painful times for the British royal family, largely the 1990s. This was a particularly dark and tumultuous time for the family. In December 1992, Prince Charles officially separated from Princess Diana after years of turmoil, including Di’s battle with bulmia. Looking back on 1992, Queen Elizabeth once called it her “annus horribilis” or year of misfortune. The couple officially divorced in August 1996, and Diana died in a car crash a year later on Sunday, August 31, 1997, when William and Harry were 15 and 12, respectively (with the royal family heavily criticized for how they handled the former princess’s death).

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“I think this series is going to be quite uncomfortable viewing, not just for [Queen Consort] Camilla and [King] Charles but also for William and Harry,” Nicholl explained in a recent interview with ET. “Scenes leading up to their mother’s death are going to be very, very uncomfortable for them. This is a period that they had to live out so publicly. We heard Harry talk about the very real impact it’s had on his life, and William as well. So for this to sort of be revisited, even if it’s done tastefully … for this to be brought up all over again is incredibly hard for William and Harry.”

“[There is] a sense that, really, their mother’s ghost can’t ever be laid to rest for them,” Nicholl added. “I think [that] is really still something that’s very real and very difficult for them.”

The Crown’s ‘Biggest Problem’ is the Royal Family is Still Alive

In the ET interview, Nicholl explained that the “biggest problem” with The Crown that the royal family and critics, like Dame Judi Dench, who recently called the show “cruelly unjust,” have is that it “is about people who are still alive today.”

She continued, “The events, yes, are 25 years old, but they still feel very current because they’re constantly still making headlines – largely through films and TV series like this. Those early [seasons] felt like there was enough history, felt like there was enough distance. But this just feels uncomfortably close.”