Serial (radio and television) usually ran from Monday through Friday at exactly the same time every day. A show called The Smith Family which ran only one night a week on WENR in Chicago during the early 1930s was credited as the "great-granddaddy of the soap operas" by radio historian Francis Chase, Jr. One of the other shows that helped pioneer the daytime soap opera/serial was "The Guiding Light", which debuted on NBC radio in 1937, and then switched to CBS Television in 1952. "The Guiding Light" final episode aired on September 18, 2009, having a total of 15,762 episodes air on CBS. Some
Metropolitan Opera radio broadcasts series continued on the Blue Network's successor, ABC, through 1958. From 1958 to 1960 the series was broadcast on CBS. As network radio waned with the rise of television, the Met founded its own independent Metropolitan Opera Radio Network in 1960, which is now heard on radio stations around the world. The Met's first live closed-circuit television transmission was "Carmen" with Rise Stevens, sent to 31 movie theaters in 27 US cities on December 11, 1952. In Canada the live broadcasts have been heard since December 1933, first on the Canadian Radio Broadcasting Commission. Since 1934 they have been heard