In its initial season, Bonanza aired on Saturday evenings and placed at number 45 in the Nielsen ratings. The premiere was on September 12, 1959, and the final episode broadcast on January 16, 1973. The entire run of the series' 431 hour-long episodes was produced in color.
Bonanza is an American western television series developed and produced by David Dortort and broadcast in the United States for 14 seasons on the NBC network.
