first up tonight, a conversation with the man who blew the whistle on bernie madoff, harry markopolos. after a career as an security industry executive, he became a freelance fraud investigator and uncovered the ponzi scheme run by bernie madoff. his book is called "no one would listen." also tonight, "ncis" star mark harmon is here. the cbs series is now in its seventh season on cbs. it has become one of the most watched shows on television. we're glad you joined us. >> nationwide is on your side. >> and by contributions to your pbs station from viewers like you. thank you. [captioning made possible by kcet public television] tavis: harry markopolos is a former securities executive whose own investigatorive worked uncovered the ponzi scheme perpetrated by bernie madoff. his book is called "no one would listen," a true financial thriller. he joins us tonight from boston. harry, good to have you on this program. >> thank you for having me. tavis: having gone through the text, i understand it, for those who know the story, they understand why you would call the book "no one would listen