What a fascinating edition of Insight! Lying is an interesting topic - we're taught to lie, then punished for lying later in the life. A lie is in the pitch of the voice, the eyes, facial movement and some body language. Perhaps humans are born with an ability to read other humans? Some people's ability to read others is more developed because they might use these techniques in their profession.
I can read people and pick a lie. It's an odd feeling knowing someone is deliberately trying to mislead you.
It was very interesting. Unfortunately, I didn't catch the entire episode.
Try online - it was a rerun from 2006, so it would have to be on the Insight archive...