AllMovie

While piloting the Enterprise's shuttlecraft, Deanna Troi crash lands on Vagra 2. She is promptly taken captive by Armus (Mark McChesney), a sadistic creature capable of altering its shape at will. Taking great delight in tormenting the rescue team, Armus causes the death of Lt. Tasha Yar. The anger and outrage engendered by this tragedy ends up hoisting Armus on his own petard. A truly pivotal episode, "Skin of Evil" was written by old Outer Limits hand Joseph Stefano and Hannah Louise Shearer and was first telecast on April 30, 1988.