Glee's children: The Get Down and Crazy Ex-Girlfriend advance musical television

Over the last several years, musical television has achieved a kind of quiet ubiquity. Here in the era of “Peak TV,” a series like Empire can reach a level of cultural importance that defines generations of entertainment. Shows like Nashville, NBC’s ever-growing stable of lavish productions like The Wiz Live!, and even HBO’s failed Vinyl are all working with the same basic expectation: people will show up for stories told through song.Though the musical-as-TV-show (or eve