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 story was completely resolved by the end of the episode, and there were no end-of-episode cliffhangers. After the first couple of seasons, all three shows changed their story format to that of a pure soap opera, with interwoven ongoing narratives that ran over several episodes. "Dynasty" featured this format throughout its run. The soap opera's distinctive open plot structure and complex continuity was increasingly incorporated into American primetime television programs of the period. The first significant drama series to do this was "Hill Street Blues". This series, produced by Steven Bochco, featured many elements borrowed from soap operas, such as