At the end of the last story the Doctor broke his tooth, now he needs a Dentist. He ends up going to one of the most dangerous Dentists in history Doc Holiday. This story marks two major points in Doctor Who long history. One. This is the Doctors first adventure in America. Two. This is the beginning of the end of the purely historic stories. The televised story this book is based on is considered one the worst Doctor who adventures ever made . I've watched the DVD version of show, and I agree with the verdict. It was horrible. The book version I liked better, it had the right amount of humor that I liked. Donald Cotton did a great job with it. Read the book, skip the DVD.