The show was canceled in 1967 and then brought back for the 1972-1973 season in once-a-week syndication and again from June 15 to July 6 , 1976 , for a Summer run . The show was revived for the 1972-1973 season in once-a-week syndication and again from June 15 to July 6 , 1976 , for a Summer run .