Dr. Sanjay Gupta investigates the safety of the nation's food supply, which the CDC estimates is responsible for causing some 76 million people to become sick every year, with an approximate 325,000 requiring hospitalization and 5,000 dying. Included: an interview with Dr. Robert E. Brackett, the director of the FDA's Center for Food Safety and Applied Nutrition; the experiences of a family who became ill after eating E. coli-contaminated greens.—TV Guide

Last year, more than 350 people got sick or died eating tainted spinach and lettuce. Others became ill after consuming peanut butter contaminated with salmonella. A recent pet food scare has many consumers worried if it could drastically affect human health. In Danger: Poisoned Food, Dr. Sanjay Gupta, CNN's chief medical correspondent, investigates current threats to the nation's food supply all the way from the fields and farms to the packaging plants to the grocery store shelves. Dr. Gupta also exposes how the U.S. government's approach to these dangers may be putting Americans at additional risk.—CNN