Bonanza aired under a second name!
The show ran so long that it had re-runs in syndication while new episodes still aired. To prevent confusion the re-runs of the show were aired under the name Ponderosa.
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David Canary left and returned thanks to a certain star.
Canary left Bonanza after fighting over contracts with the production team but he would later return at the behest of star Michael Landon. After Bonanza Canary would go on to star in All My Children for nearly 17 years.