For the six years he worked on “The Mentalist,” beginning in 2009, Jordan Harper’s job was far more than a writing gig. He and his colleagues in the writers’ room of the weekly CBS drama were heavily involved in production. They weighed in on costumes and props, lingered on the set, provided feedback to actors and directors. The job lasted most of a year.But by 2018, when he worked on “Hightown,” a drama for Starz, the business of television writing had changed substantially. The writers spent about 20 weeks cranking out scripts, at which point most of their contracts ended, leaving many to scramble for additional work. The job of overseeing the filming and editing fell largely to the sh …
