Review by robert-temple-1

This is an ingenious and interesting B thriller. The 'sphinx' is a deaf mute, who is, to say the least, extraordinarily enigmatic. (No Egyptian connection! Not a pyramid in sight!) Lionel Atwill plays 'the sphinx' and makes the part very compelling. The mystery is: how can this man who, the doctors say, has been deaf and mute from birth, be a psychopathic murderer who always speaks to the witnesses of his crimes? This takes a lot of figuring out. He is tried and acquitted of murder, natch. But is there more to this? The ingenue role is played by Sheila Terry, who is extremely lively and is very like Fay Wray but without the steamy sensuous air about her. Her eyes sparkle, one wants to go on watching her, and it is a pity she quit films early and died aged only 46. (Here she is 23.) A young fellow of considerable charm is always trying to get her to marry him, played very well by Theodore Newton. Luis Alberni plays an amusing character part. This is a cheapie but a goodie.