Very often Buffy was shown with her 'Mrs. Beasley' doll. That became the highlight of the show so much a line of replica Mrs. Beasley dolls was launched. It sold well and continued to sell even two years after the series' cancellation.
Producer Don Fedderson insisted that the character of Buffy remain perpetually six years old, even as Anissa Jones, the actress playing her, grew into her teens; in promotional appearances Jones was still required to bind her chest and carry the Mrs. Beasley doll.
When Sebastian Cabot unexpectedly became ill during the first season, he was replaced by John Williams. It was explained that Giles French was summoned to England by the Queen, and his brother Niles filled in at the Davis' doorstep.
Even though the series was still relatively popular during its final season, it still was canceled as part of the infamous "Rural Purge" when CBS decided to cancel all of their rural and family oriented shows in favor of more edgier programming.