WBZ-TV, channel 4, is a CBS-owned-and-operated television station located in Boston, Massachusetts, United States. The station is owned by the CBS Television Stations subsidiary of CBS Corporation, and is part of a duopoly with MyNetworkTV affiliate WSBK-TV (channel 38), The two stations share studios and office facilities located on Soldiers Field Road in the Allston-Brighton section of Boston; WBZ-TV's transmitter is located in Needham, Massachusetts on a tower site that is owned by CBS (which is shared with transmitters belonging to WCVB-TV, WGBH-TV, WGBX-TV and WSBK-TV).
WBZ-TV is also one of six local Boston television stations seen in Canada by subscribers to satellite provider Bell TV, and is also seen on most cable systems in Atlantic Canada.
As the only television station that was built from the ground up by the Westinghouse Electric Corporation, WBZ-TV began operations on June 9, 1948, at 6:15 PM with a broadcast hosted by Arch MacDonald. The station was from its inception associated with the NBC television network, owing to WBZ radio (1030 AM)'s longtime affiliation with the NBC Red Network. At its sign-on, WBZ-TV became the first commercial television station to begin operations in the New England region. The station originally operated from inside the Hotel Bradford alongside its radio sister; its current home was not completed at the time, although master control and its self-supporting tower over the building were in use at sign-on. The WBZ stations would not move into what was then known as the Westinghouse Broadcasting Center until June 17, 1948, when the building was finished.