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 a line of primetime telenovelas (a genre similar to soap operas in terms of content) upon its launch in September 2006, but discontinued its use of the format in 2007, after disappointing ratings. On June 13, 2012, "Dallas", a continuation of the 1978 original series premiered on the cable network, TNT. The revived series, which was canceled after three seasons in 2014, delivered solid ratings for the channel, only losing viewership after the show's most established star, Larry Hagman, died midway through the series. In 2012, Nick at Nite debuted a primetime soap opera, "Hollywood Heights", which aired episodes five