Americana is a weekly game show which ran on NBC from December 8, 1947 to July 4, 1949. The series was originally hosted by literary critic John Mason Brown and produced by Martin Stone Productions with NBC Television. Each week's show was sponsored by Encyclopedia Americana. The 30-minute show aired Mondays at 8:10pm ET in the 1947-48 television season, and Mondays at 8:30pm ET in the 1948-49 season..