nbctv "Grimm" network "The Office" airer U.S. provider of Olympic coverage Rockefeller Plaza ntwk Its headquarters are at 30 Rockefeller Plaza "Today" airer: 2 wds "The Blacklist" home "S.N.L." network "L.A. Law" airer "Chuck" channel First World Series color broadcaster, 1955 It's headquartered in the G.E. Building "More colorful" sloganeer "America's Got Talent" airer "The Voice" airer Major tenant of Rockefeller Center "SNL" network "The Blacklist" network "This Is Us" network