The two television shows that challenged societal normos during the 1970s are All in the Family and Saturday Night Live.
All in the Family broke ground in issues previously considered unsuitable for U.S. networks. All in the Family is an American sitcom TV-series that was originally broadcast on the CBS television network for nine seasons, from January 12, 1971 to April 8, 1979.
Saturday Night Live started Oct 11, 1975; controversial parody of American culture and politics.
Saturday Night Live (SNL) is an American late-night live television variety show created by Lorne Michaels.