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 typical of American daytime soaps; all of the others ran half-hour episodes. Unlike American or British soap operas, the most influential of which have run for years or even decades, even daily Canadian soap operas have run for a few seasons at most. Short-run soaps, including "49th & Main" and "North/South", have also aired. Many of these were produced in an effort to comply with Canadian content regulations, which require a percentage of programming on Canadian television to originate from Canada. Notable prime time soap operas in Canada have included "Riverdale", "House of Pride", "Paradise Falls", "Lance et Compte" ("He