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
The Soap Opera Encyclopedia (Schemering book) and characters. Schemering also includes a "Short History of Television Soap Opera," as well as profiles of major performers, writers and producers in the genre in a section entitled "Who's Who in Soap Opera." Finally, the book contains 30 pages of photos from various programs. Published in a time before the internet, the "Encyclopedia" was a primary source of background information and commentary on soap opera; it and Schemering have been quoted in various articles, books and web pages. It was revised and reprinted in 1987 () and 1988. According to the "Encyclopedia", Schemering "spent fifteen years collecting memorabilia and