videos news videos news Keep US Beautiful 1973 returning series 1 season Comedy variety special with an ecological twist, urging people not to pollute. watched want to watch news ✕ loading… videos ✕ KNBC-TV4 (1973) "Keep American Beautiful" featurette cast Raymond Burr self Carol Burnett self Ruth Buzzi self Tim Conway Don Knotts Lena Horne Sandy Duncan Edward Andrews self seasons Season 1 1 episode · 1973
