In this science fiction thriller, Rock Hudson tenderly portrays isolated scientist Dr. Paul Holliston, who gets involved doing experiments on a human fetuses and discovers a method to accelerate the process of the fetus growing into a mature adult in just a few days. Barbara Carrera is perfect as Victoria, his not so perfect, perfect looking instant adult female who is Holliston's first success along with a dog. And things only get worse once the "adult" fetus turns into a homicidal psycho and starts looking for a new formula to prevent her from aging any further. In a kind of contemporary science fiction thriller meets THE BRIDE OF FRANKENSTEIN, director Ralph Nelson manages an effective blend of old and new plot elements. The plot driven screenplay is based on a story by Jack W. Thomas. Diane Ladd turns in a great supporting performance as Martha, Dr. Holliston's jealous housekeeper. The story wasn't filmed until ten years after its inception because producer's allegedly feared that its topic, misfortunes with growth hormones, was too provocative for audiences.