Demonstration of the effects of drugs on the human brain. An illustration of a human head with various types of illegal or illicit drugs around it -- a hypodermic needle, powders, pills and capsules. ECU of a young boy writing on a piece of paper. Various shots of the boy studying at his desk from a textbook. He scratches his head. Still photographs of psychologist Karl Lashley and other scientists researching the location of human memory in the human brain. Various shots of scientists conducting research and experiments, using microscopes. Animation of the double helix from a strand DNA.