In the golden era of 1970s TV detective shows, Harry O stood out. David Janssen, already renowned for his role in The Fugitive, played Harry Orwell, a San Diego cop who retired after being shot in the back. The chemistry between Janssen and Anthony Zerbe, who delivered an Emmy-Award winning performance as Lt. K.C. Trench, captivated viewers and contributed to the show's popularity. While Harry O was largely character-driven, it also featured compelling plots that retained the show's audience throughout its two seasons.

In this viewing companion to Harry O, all episodes are covered, along with information about cast, crew, locations, and story analysis. The book contains examinations of archival material, including series' creator Howard Rodman's papers. It also features new interviews conducted by the authors, providing insight into the creation of the series. From the filming of the pilot episodes in 1972 to the show's cancellation in '76, the book offers a comprehensive history of each step in the show's development.