The television station has always been a primary NBC affiliate, but in its first two years spent around one-quarter of its broadcast day carrying programs from CBS; Lynchburg's WLVA-TV (channel 13) was the nearest primary CBS affiliate, but its transmitter location at the time did not cover Roanoke at all. All CBS programming was dropped when WDBJ-TV signed on in 1955 as Roanoke's primary affiliate. In the late-1950s and the 1960s, WSLS-TV also aired locally produced programming, including "Echo", "Klub Kwiz" (a competitor to WDBJ's "Klassroom Kwiz"), "Ebb and Andy", "Spectrum", "Glen Howell", "Cactus Joe", and "Profile".