its six-year run. Since Dr. Quinn ended, the ranch has been used numerous times for other filming projects. Numerous buildings, including the church, Sully's homestead, the school house, and the Spring Chateau Resort, were leveled soon after the series was canceled. However, the entire town still remained. Despite minor changes over the years, it was still recognizable as the Dr. Quinn set, and was a popular tourist attraction for many fans until the entire set was destroyed in the Woolsey Fire in late 2018. Other areas used throughout the series were the back lot at Universal Studios in Hollywood, including the New England street as the location of the Quinn family home; and the New York streets, doubling as the streets of Boston and Washington. The setting of Boston in the final movie was filmed in Canada, using various locations in Old Montreal. William Olvis wrote the underscoring music for the series, except for a few episodes in season one (where he either alternated with Star Trek spin-off series composer David Bell, or co-scored with Bell) and the Revolutions movie. Jane Seymour's husband, James Keach, directed and produced numerous episodes of the show, and guest starred in the season 5 episode entitled "The Hostage." Due to child labor laws, the role of Katie, Dr. Mike and Sully's young daughter, was portrayed by identical triplets: Alexandria, McKenzie, and Megan Calabrese. Jane Seymour is the only cast member who appeared in every episode of the series. Shawn Toovey missed only one episode, as did Chad Allen, who also did not appear in the episode titled "Reunion" (Season 4), as well as the two made-for-TV movies. Joe Lando came in third, missing only a few episodes in the sixth and final season. Starting in season 4, several episodes featured real world trivia relevant to the episode's context, usually about medical knowledge. These segments would appear at the end of the episode in the form of white text on a black background, narrated by Jane Seymour. In the episode "A Place to Die," the inclusion of the trivia was particularly significant because it revealed that Dr. Mike's practice was besieged by a staph infection, a malady that was completely unknown at the time. No one, Dr. Mike included, actually figured out what was behind this mysterious blight, which killed several of her patients and forced her to fumigate the building and cremate everything inside,