IDU: Unethical science

First do no harm.
We assume that scientists and doctors are the ‘good guys’ in society. And by and large they are except when they are not.
So why do certain people cross the line of ethics? Author of The Icepick Surgeon: Murder, Fraud, Sabotage, Piracy, and Other Dastardly Deeds Perpetrated in the Name of Science Sam Kean joins William Shatner on this week's episode of 'I Don't Understand' to discuss unethical science.