All good things must come to an end. Why was Bonanza cancelled?

Answer A main character died

One of the show's leads, Dan Blocker who played "Hoss," passed away of a pulmonary embolism in 1972 at the age of 43. The fan favorite's death was essentially the death of the series, as the character's absence caused the show's ratings to plummet.

Last updated 5 years ago · 110.2K views · SOURCE