More than three years ago, thousands of volunteers combed an Orlando suburb in search of missing 2-year-old Caylee Anthony. But when a chilling discovery in December ended all hope, and behavior seemingly inconsistent with a concerned mother pointed toward the child's mother, Casey Anthony was arrested. This summer, Casey was put on trial for Caylee's murder in a televised courtroom drama that captivated a country -- and ended as sensationally as it began. Citing insufficient evidence, the jury found Casey not guilty of first-degree murder, aggravated manslaughter, and aggravated child abuse, but found her guilty of four counts of providing false information to authorities. By sitting down with Dr. Phil, Casey's parents, George and Cindy Anthony, broke their silence for the first time following the trial. In the final chapter of this three-part interview, Dr. Phil turns the spotlight to the courtroom and breaks down the process that led to the acquittal that rocked the nation. Will Cindy admit to lying under oath to protect her only daughter? How much did the family know about Casey's shocking defense strategy? Plus, the one question no one has ever asked. Don't miss the dramatic conclusion.

Tune in to watch the entire interview. Check your local listings.

Catch up on what you missed in Part 1 and Part 2:

How did George and Cindy feel about Casey's shocking defense?

How did the family discover Casey's accusation of sexual molestation?

Dr. Phil looks to the future. Would George and Cindy trust Casey with a child in the future?