(Original airdate: October 27, 2011)Insults, jealousy and bad behavior -- a couple on the brink of divorce asks Dr. Phil to help save their marriage. Mark made headlines for seeking revenge on his soon-to-be ex-wife, Sabrina, by posting an online advertisement that compares her to the used car he's trying to sell. In it, he pokes fun at her stretch marks, leathery exterior, motormouth and low-performance brain. Find out why, despite Sabrina's hurt feelings, he says he's proud of the ad. After sitting down with Dr. Phil, will he have a change of heart? Sabrina says their marriage has been a train wreck from the beginning when, on their honeymoon, she says Mark went out for drinks one evening and didn't return until morning. Where did he spend the night? Four months later, Mark filed for divorce, but the couple stayed together. Now, four years and two kids later, they say they've finally had enough of slinging insults and blame and are ready to call it quits again. What Dr. Phil recommends for this couple may shock you.