Steven Bochco, who died Sunday, created numerous series, including ‘Hill Street Blues’ and ‘NYPD Blue.’ TV Critic David Bianculli looks back on Bochco’s impact, then we listen to his 1989 ‘Fresh Air’ interview. Yunte Huang’s new book, ‘Inseparable,’ chronicles the lives of the “original Siamese twins,” Chang and Eng Bunker, who were brought to America in 1829 and forced to perform in a freak show. They later married and fathered 21 children.