 NBC executives initially rejected the program as a series, but high ratings for the pilot changed their minds.The show aired as part of the "NBC Mystery Movie" in 1974–1975, replacing "Hec Ramsey", but was canceled after three 2-hour episodes.Jessica Walter stars as Amy Prentiss, a relatively young investigator who becomes the first female Chief of Detectives for the San Francisco Police Department following the previous chief's death.