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
Soap opera early 1970s and in 1972, debuted "Emmerdale Farm" (now "Emmerdale"), based on the successful format of the Irish soap opera. In the late 1970s, "The Riordans" was controversially dropped. The creator of that series would then go on to produce the second of his "Agri-soap" trilogy "Bracken", starring Gabriel Byrne, whose character had appeared in the last few seasons of "The Riordans". Bracken was soon replaced by the third "Agri-soap" "Glenroe", which ran until 2001. As RTÉ wanted a drama series for its Sunday night lineup rather than a soap opera, "On Home Ground" (2001–2002), "The Clinic" (2002–2009) and "RAW"