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 but the experiment was largely a failure). Due to the masses of episodes produced for a series, release of soap operas to DVD (a popular venue for distribution of current and vintage television series) is considered impractical. With the exception of occasional specials, daytime soap operas are notable by their absence from DVD release schedules (an exception being the supernatural soap opera, "Dark Shadows", which did receive an essentially complete release on both VHS and DVD; the single lost episode #1219 is reconstructed by means of an off-the-air audio recording, still images, and recap material from adjacent episodes). Due to