High Quality Content by WIKIPEDIA articles! Masterpiece (formerly known as Masterpiece Theatre) is an anglophilic drama anthology television series produced by WGBH Boston. It premiered on PBS on January 10, 1971, making it America's longest-running weekly primetime drama series. The series has presented numerous acclaimed British productions. Many of these are produced by the BBC, but the line-up has also included programs shown on the commercial ITV network and Channel 4.