WTHR-TV, Channel 13, is the NBC affiliate in Indianapolis, Indiana. It first signed on September 2, 1957 as WLWI, under the ownership of Crosley Broadcasting Corporation. Due to the relatively weak standing of ABC, the network with which it was originally affiliated, the station struggled for much of its first 20 years. During that time, Crosley sold the station to Avco Financial Services, who, in turn, sold it to Columbus, Ohio-based Dispatch Broadcast Group in 1974.
When ABC ascended to first place in the late 1970s, they were looking for stronger affiliates. WTHR switched to last-place NBC in 1979, with former NBC affiliate WRTV taking over the ABC affiliation. Ratings still did not improve until the mid-1990s, when the station hired former CBS reporter John Stehr as an evening news anchor. By 2002, WTHR had overtaken its competition.