Prince William has been through hell and back. It's no secret the royal family has been through a LOT the last few years. Prince Harry and Meghan Markle's estrangement was already difficult enough, but then came joint cancer battles for King Charles III and Princess Cathrine. In a new trailer for his episode of Eugene Levy's Apple TV+ series, The Reluctant Traveler, out on Wednesday, the Prince of Wales opened up about how challenging those health battles were for him to face.