About KING 5Channel 5, originally known as KRSC-TV, made its debut on November 25, 1948 as the first television station in the Pacific Northwest. It was owned by Palmer K. Leberman's Radio Sales Corporation, which also operated KRSC radio stations 1150 AM (now KKNW) and FM 98.1 (now KING-FM). The station's first broadcast was a live remote of a Thanksgiving Day high school football game, which reportedly had some technical difficulties but was still well-received by local viewers.
In its early years, Channel 5 was a primary CBS affiliate and also carried secondary affiliations with NBC, ABC, and DuMont. The station was an important source of news and entertainment for the region and played a significant role in the development of the local media landscape.