Science documentaries for learning. NOVA is the most-watched prime time science series on American television, reaching an average of five million viewers weekly. Now in its fourth decade of production, the series remains committed to producing in-depth science programming in the form of one-hour documentaries and long-form mini-series, from the latest breakthroughs in technology to the deepest mysteries of the natural world. NOVA is produced by WGBH Boston and airs Wednesday nights at 9/8c on most PBS stations. The Director of the WGBH Science Unit and Senior Executive Producer of NOVA is Paula S. Apsell.