Advertisement The horror prequel “IT: Welcome to Derry” has shattered expectations with its debut. The series launched with a hugely impressive viewership number. This performance immediately places it among HBO’s most successful premieres.According to internal data reported by HBO, the premiere episode attracted 5.7 million viewers in the United States. This strong start signals a … Continue reading IT: Welcome to Derry Premieres to Massive 5.7 Million Viewers