Cause of death: natural cause
Richard Norman Anderson (August 8, 1926 – August 31, 2017) was an American film and television actor. One of his best-known roles was his portrayal of Oscar Goldman, the boss of Steve Austin (Lee Majors) and Jaime Sommers (Lindsay Wagner) in both The Six Million Dollar Man and The Bionic Woman television series between 1974 and 1978 and their subsequent television movies: The Return of the Six Million Dollar Man and the Bionic Woman (1987), Bionic Showdown: The Six Million Dollar Man and the Bionic Woman (1989) and Bionic Ever After? (1994).
Source : Wikipedia