Lying is usually a defense mechanism that we use to get ourselves off the hook. Sometimes we can tell when a person is lying, but other times it may not be so easy. "Caught in a Lie" will reveal why a "lie detector" doesn't really detect lies. You will discover what happened when actor Kirk Cameron tried to fool a polygraph machine. Why did his heart rate and blood pressure suddenly increase when he answered certain questions? "Caught in a Lie" will also show you that there have been two reliable witnesses to every crime of this world. Do you know what they are?