Dark Matters: Twisted But True

Pavlovian experiments are performed on orphans; red rain that appears to contain biological cells falls in India; a glow-in-the-dark paint used during World War I contains a deadly ingredient.

A musical genius is forced to create the most brilliant piece of spy technology ever. Wendell Johnson turns his own stutter into a research topic, but it takes a twist in when he experiments on orphans. Dr John Ziegler introduces steroids to athletes.

One man combined the occult and rockets to produce the technology that underpinned Mutually Assured Destruction. A skull found in 1912 seems to solve Darwin's puzzle of where we came from. Mary Mallon infects hundreds with typhoid despite being healthy.