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 Grundy Ufa wanted to produce another soap for RTL. Like "GZSZ", the format was based on an Australian soap opera from Reg Watson. But RTL did not like the plot idea about separated twins who meet each other for the first time after 20 years and fall in love without knowing that they are related. The project was then taken to Das Erste, which commissioned the program, titled "Verbotene Liebe", which premiered on January 2, 1995. With the premiere of "Verbotene Liebe", the network turned "Marienhof" into a daily soap as well. In the meanwhile, RTL debuted the Grundy Ufa-produced