'The Crown': What Went Into Finding Princess Diana and Margaret Thatcher

There are shows that cast with a healthy sense of acting rotation in mind, and then there is "The Crown.” In other words, people have been conditioned to not get too attached to certain performers, but to absolutely retain that affection for the characters. The world-renowned Netflix drama about the royal family through decades of societal change and internal conflict recasts its principal roles every two seasons, and while some shows could easily lose momentum employing such a process, "The C...