CBS was not pleased with the prospect of being subjected to numerous preemptions of its programs in the nation's fifth-largest market at the time (as of 2016, it is the seventh-largest), especially since channel 5 – under the WHDH license – had been its second-largest affiliate and largest on the East Coast. It refused to have anything to do with WCVB, and moved its programming back to WNAC-TV, which had been Boston's original CBS affiliate from 1948 to 1960. More or less by default, WCVB signed up with ABC.