In 1967, as part of a general system rebranding by the newly formed MBTA, the subway lines were assigned colors. The streetcar system—then down to five branches, and soon four—became the Green Line, the Cambridge–Dorchester line became the Red Line, and the Main Line El became the Orange Line. In the 1970s, the MBTA began allowing street musicians to play in the station. Park Street was used as a filming location for "See How She Runs" (1978) and "" (1985–88); the sitcom "Park Street Under" (1979) was set in a fictional bar inside the station.