We investigate the science behind serial killers who hide their dark sides from their families and live secret lives. Real women share stories of how they uncovered the shocking truths about their loved ones. Find out the warning signs that someone you know may have a double identity.

Want to know how to look marvelous without splurging so much? Dr. Oz invites three beauty experts to share the smartest ways to save money while looking fabulous starting from your hair and makeup tools to the beauty products you use.