Charlie's Angels is an American crime drama television series created by Ivan Goff and Ben Roberts for ABC. It originally aired from September 22, 1976, to June 24, 1981, airing for five seasons, consisting of 115 episodes. The show follows the crime-fighting adventures of three women working at a private detective agency in Los Angeles, California, and originally starred Kate Jackson, Farrah Fawcett, 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.

Source: Wikipedia