Does anyone know the exact date when What's My Line moved in David Letterman's studio (Ed Sullivan) and did their first color broadcast? This would be a lot of fun to watch hoping they comment on the colors and the new studio. Wonder if they ever mention Sullivan. I know the actual color versions of these shows don't exist and we can only imagine. But we can still feel want most Americans felt when watching on their black and white TVs...."Wonder what this looks like in color." Some things never change. Here we are in 2008 hearing them mention color and thinking, "I wish I could see his tie in color." The same sentence was uttered some where in the United States by someone watching WML back in 1966.