In 2011, Martindale joined the cast of Justified for the second season. She played the role of Mags Bennett, matriarch of the Bennett crime family which controlled much of the drug activity in the fictional version of Harlan County, Kentucky. She won the Primetime Emmy Award for Outstanding Supporting Actress in a Drama Series for her performance. After learning of the nomination, Martindale told CNN she hoped that it would open up more doors for older women in Hollywood. "People really identify with this character [Mags Bennett] and I think it's because it is a character that is powerful and older and extremely mean", she said.