Approved | | Horror, Mystery, Sci-Fi
A hotshot reporter and a young doctor team up to investigate a series of grisly murders and a mysterious sample of synthetic blood.
Boris Karloff was to star as Dr. X.
Detective Roy Kincaid:
What is this Group 1, Group 4 business?
Dr. Mike Rhodes: Well, you see, medical science has discovered that human blood is divided into four different groups, #1 being the most rare and #4 the most common,. We must see to it that certain of these types are not mixed...
When Bogart abducts Rosemary Lane they leave in a light colored, late '30's cab. As the police pursue them it changes to a black, vintage car. When they arrive at the hide-out in the woods its a newer light colored cab again.