In 1965, 'The Sound of Music' became a phenomenon that saved 20th Century Fox from bankruptcy. It utilized the 'Roadshow' format, where it played in only one theater per city with reserved seating and intermissions, creating an air of prestige and exclusivity. The film's popularity was so immense that some theaters showed it continuously for over two years. It eventually surpassed 'Gone with the Wind' to become the highest-grossing film of its time. Its success demonstrated that musicals could be massive global blockbusters, a trend that influenced the industry for decades until the rise of the high-concept action movies in the mid-1970s.