Dr. Oz makes a house call.

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In February 2008, Dr. Oz conducted a follow-up with Gail, Leon and Wendie—three longtime smokers who had just weeks before made a commitment to quit.

During the show, 35-year-old mother Wendie explained that she was having trouble because her husband of eight years, Tony, was continuing to smoke. Dr. Oz told her this would put her goal of staying smoke-free in jeopardy. "I've got a prediction to make. If he doesn't stop smoking, you will probably fail," Dr. Oz says. "If he smokes, you will smoke again."

After meeting Wendie, Dr. Oz says he had a nagging feeling that he wasn't getting the full story, so he flew to visit her at her home in California.