Through a mix of archival footage, b-roll and interviews with members of the show’s original cast and current gender-swapped run cast members, Elliot and her production team, New York theater critics, Sondheim’s biographer, Broadway lovers like Cynthia Nixon as well as stars like Lin-Manuel Miranda, Candance Bushnell and Sondheim himself, the PBS doc tells the story of how a musical over 50 years has captured a changing city, creative arts industry, gender and society. 'Stranger Things' Star Gaten Matarazzo Joins Cast of Broadway's 'Dear Evan Hansen'