The late, great Johnny Carson attempts to play the theremin on The Johnny Carson Show, which ran from 1955 to 1956. Samuel Hoffman, who played theremin in Spellbound and The Day the Earth Stood Still, is Carson's guide. These were different days in American pop culture: a Margaret Truman joke is followed by a Helen Traubel joke. The young Johnny is a little bit campier than the later one. (Via Jon Bernhardt.)