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 soap opera advertisers pay the most for. Those who might watch in workplace breakrooms are not counted, as Nielsen does not track television viewing outside the home. The rise of cable and the internet has also provided new sources of entertainment during the day. The genre's decline has additionally been attributed to reality television displacing soap operas as TV's dominant form of melodrama. An early term for the reality TV genre was "docu-soap". A precursor to reality TV, the televised 1994–95 O. J. Simpson murder case, both preempted and competed with an entire season of soaps, transforming viewing habits and