Inspector Ames and Colonel March are meeting when suddenly a blustering John Cusby bursts in, demanding that they investigate the psychoanalyst Dr. James Patton. Cusby insists that the doctor has too much influence over his wife and if the police don't stop the doctor from having such influence over her, he'll kill the doctor. What? At any rate, March investigates and while at the doctor's office meets Mrs. Patton, who is a Nazi concentration camp survivor whose experience has made her mentally ill and Dr. Hayes who is in training to be a psychoanalyst and is undergoing analysis himself with Dr. Patton as part of his training. Mrs. Cusby is having a session with Patton and when done with her narrative, gets up to leave and finds the doctor dead at his desk. Since he was stabbed with a hat pin that belonged to her and since the doors to the session room were locked, she quickly becomes the prime suspect. When one of the characters wants March to hurry up the investigation by saying "There's a dead man in there," March sadly replies "Unfortunately, he won't mind waiting." Best line in the episode. John Dickson Carr was the premier practitioner of the locked room mystery and this episode reflects a pretty good example of this even though the resolution to the mystery is rushed. An entertaining episode.