Soap opera soap opera "Guiding Light" (originally titled "The Guiding Light" until 1975) started as a radio drama in January 1937 and subsequently transferred to television in June 1952. With the exception of several years in the late 1940s, during which creator Irna Phillips was involved in a dispute with Procter & Gamble, "Guiding Light" was heard or seen nearly every weekday from 1937 until 2009, making it the longest story ever told in a broadcast medium. Originally serials were broadcast as fifteen-minute installments each weekday in daytime slots. In 1956, "As the World Turns" and "The Edge of Night", both produced
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"