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 its first radio soap, "Kennedys of Castleross", which ran from April 13, 1955 to 1975. In 1979 RTÉ long running TV soap The Riordans moved to Radio until December 24, 1985. In the mid-1980s, RTÉ debuted a new radio soap, "Harbour Hotel", which ran until the mid-1990s. The network later ran two short-lived radio soaps, "Konvenience Korner" and "Riverrun", which were followed in 2004 by "Driftwood". RTÉ does not run any radio soaps, however RTÉ Radio 1 continues to air radio dramas as part of its nighttime schedule. In Greece, there have been several soap operas. An early serial was