How Downton Abbey's Score Became One of Its Most Powerful Brand Assets

Refashioning the music for the film is a key ingredient to its success

LONDON—As soon as the credits rolled on the final episode of Downton Abbey—the British import period drama that became a smash hit on PBS—there was talk of a follow-up film. Though it took a few years for the movie to get the official go-ahead, the final product lands in theaters stateside this weekend, a little less than four years after the series finale aired in early 2016.