Bonanza
The family lived on a thousand square-mile (2,600 km) ranch called the Ponderosa on the eastern shore of Lake Tahoe in Nevada opposite California on the edge of the Sierra Nevada range]. The vast size of the Cartwrights' land was quietly revised to "half a million acres" (2,000 km) on Lorne Greene's 1964 song, "Saga of the Ponderosa." The ranch name refers to the Ponderosa Pine, common in the West. The nearest town to the Ponderosa was Virginia City, where the Cartwrights would go to converse with Sheriff Roy Coffee (played by veteran actor Ray Teal), or his deputy Clem Foster (Bing Russell).
Bonanza
NBC moved "Bonanza" to Sundays at 9:00 pm Eastern with new sponsor Chevrolet (replacing "The Dinah Shore Chevy Show"). The new time slot caused "Bonanza" to soar in the ratings, and it eventually reached number one by 1964, an honor it would keep until 1967 when it was seriously challenged by the socially daring variety show, "The Smothers Brothers Comedy Hour" on CBS. By 1970, "Bonanza" was the first series to appear in the Top Five list for nine consecutive seasons (a record that would stand for many years) and thus established itself as the most consistent strong-performing hit television series of the 1960s. "Bonanza" remained high on the Nielsen ratings until 1971, when it finally fell out of the Top Ten.