Dr. Jekyll and Sister Hyde is a British film that centers on a scientist, Dr. Henry Jekyll (Ralph Bates). Searching for something that will spice up his life, he begins taking female hormones. The serum not only changes his personality, it also changes his gender into a devious woman. Because there is now a woman around the house rather than a man, the new female says she is Mrs. Hyde, the widowed sister of Dr. Jekyll. Dr. Jekyll soon realizes that in order for the serum to keep its effect, he needs a consistent supply of female hormones. To get these hormones, he begins to kill young women. Things seem to be going well, until the male part and female part of Dr. Jekyll fight to dominate his body, causing Dr. Jekyll's behavior to become erattic. Watch Dr. Jekyll and Sister Hyde discover which gender wins out in the end.