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 the past. Modern U.S. daytime soap operas largely stay true to the original soap opera format. The duration and format of storylines and the visual grammar employed by U.S. daytime serials set them apart from soap operas in other countries and from evening soap operas. Stylistically, UK and Australian soap operas, which are usually produced for early evening timeslots, fall somewhere in between U.S. daytime and evening soap operas. Similar to U.S. daytime soap operas, UK and Australian serials are shot on videotape, and the cast and storylines are rotated across the week's episodes so that each cast member will