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 oil boom, premiering on September 27, 2015 during the 2015-16 TV season. The telenovela, a shorter-form format of serial melodrama, shares some thematic and especially stylistic similarity to the soap opera, enough that the colloquialism "Spanish soap opera" has arisen to describe the format. The chief difference between the two is length of series; while soap operas usually have indefinite runs, telenovelas typically have a central story arc with a prescribed ending within a year or two of the show's launch, requiring more concise storytelling. Spanish-language networks, chiefly Univision and Telemundo, have found success airing telenovelas for the growing U.S.