From 1969 to 1976, “Marcus Welby, M.D.” was one of television’s most popular shows. Dr. Marcus Welby was often called “the good doctor” because he made house calls, oozed wisdom, and had a caring bedside manner. Since then, television has depicted a host of other smart, compassionate doctors. There’s even a series currently running called “The Good Doctor.” Most of these TV physicians are amazing. They can save lives while flirting across the surgical table. Some are known for their unique ability to make an accurate “zebra diagnosis.” That medical term refers to situations where run-of-the-mill diagnoses abound (picture a big herd of common horses), but then a gifted doctor shows up and offers an exotic, but accurate, “zebra” diagnosis that no one had previously considered. This especially savvy doctor identifies the problem right away, prescribes the best treatment, and saves the patient. Good doctors like Marcus Welby might seem rare …