The Guiding Light debuts on NBC radio from Chicago. In 1952 it moves to CBS television, where it remains until September 18, 2009.

Guiding Light is an American radio and television soap opera. Guiding Light aired on CBS for 57 years between June 30, 1952, and September 18, 2009, overlapping a 19-year broadcast on radio between January 25, 1937, and June 29, 1956. With 72 years of radio and television runs, Guiding Light is the longest-running American soap opera, ahead of General Hospital.

The National Broadcasting Company (NBC) is an American commercial broadcast television and radio network serving as the flagship property of the NBC Entertainment division of NBCUniversal, a subsidiary of Comcast. It is one of NBCUniversal's two namesake flagship subsidiaries alongside Universal Studios. It is the first and oldest major broadcast network in the United States.

Chicago is the most populous city in the U.S. state of Illinois and in the Midwestern United States. Located on the western shore of Lake Michigan, it is the third-most populous city in the United States with a population of 2.74 million at the 2020 census, while the Chicago metropolitan area has 9.41 million residents and is the third-largest metropolitan area in the nation. Chicago is the seat of Cook County, the second-most populous county in the United States.

CBS Broadcasting Inc., commonly shortened to CBS, is an American commercial broadcast television and radio network serving as the flagship property of the CBS Entertainment Group division of Paramount Skydance Corporation and is one of the company's three flagship subsidiaries, along with namesake Paramount Pictures and MTV.