엘리멘트리시즌 4 이미지 교체에피소드 번호14Who Is That Masked Man?OverviewWhen Holmes’ investigation into the attempt on Morland’s life pushes their strained relationship to the breaking point, the identity of Sherlock’s mother is revealed. Also, when three gang members are murdered, Holmes and Watson are amazed when an elderly woman emerges as their prime suspect.Air dateFebruary 25, 2016Runtime (min)45