Luce Potter was a Mexican actress (born in Chihuahua in 1914) whose best-known performance was entirely about silence and the power of seeming passivity. Augmented by way of reptilian pincer “fingers.” Nor was she expressive in terms of her eyes or facial features —she just stared and calculated and commanded. Okay, her eyes moved once when she glanced downward at a young boy but otherwise she was impassive. She had a slight assist from William Cameron Menzies, but no one who’s seen this wordless performance will ever forget it.