Frank N Furter is indeed a doctor. A self-proclaimed mad scientist, he is responsible for the creation of Rocky Horror, a perfect man who he intends to use as his sex slave. However, before he can complete his plan, Rocky escapes and Frank is left alone in his castle with only his faithful servant Riff Raff for company. While Frank may not be a real doctor, he certainly has the credentials to back up his claim - after all, he did create life!