Richard Berthelsen fact-checks 'The Crown': How accurate is the royal series?

The fourth season of 'The Crown' has been greeted with a flurry of renewed interest in the troubled relationship between Prince Charles and Lady Diana. But did the hit Netflix get the facts right? Viewers need to beware, CTV's royal commentator Richard Berthelsen writes in his exclusive column for CTVNews.ca, as the series plays fast and loose with what really happened.