Barnaby Jones was a retired private investigator, but quickly came out of retirement after his son Hal, who had taken over Barnaby's job, was murdered. Hal's widow, Betty, helped Barnaby try and find her husband's murderer. The murder was solved, but Barnaby decided he wanted to return to investigating full-time and Betty decided to join him.
September 1975
January 1973 - May 1973
September 1973 - March 1974
September 1974 - April 1975
September 1975 - March 1976
October 1976 - May 1977
September 1977 - March 1978
September 1978 - April 1979
September 1979 - April 1980