"Charlie's Angels" is an American crime drama television series that aired on ABC from September 22, 1976 to June 24, 1981, producing five seasons and 115 episodes. The series was created by Ivan Goff and Ben Roberts and was produced by Aaron Spelling. It follows the crime-fighting adventures of three women working in a private detective agency in Los Angeles, California, and originally starred Kate Jackson, Farrah Fawcett (billed as Farrah Fawcett-Majors), and Jaclyn Smith in the leading roles and John Forsythe providing the voice of their boss, the unseen Charlie Townsend, who directed the crime-fighting operations of the "Angels" over a speakerphone. There were a few casting changes: after the departure of Fawcett, Cheryl Ladd joined; after Jackson departed, Shelley Hack joined, who was subsequently replaced by Tanya Roberts.