布莱切利四人组第一季第3集

Susan speaks to a man who claims he is the suspect's psychiatrist and to whom she unwittingly gives her reasons for seeing him. She is lucky to escape and soon realises she has met the murderer but when the police are called to the house he has vanished. She visits Cavendish for more information, only to find that he too has been killed but when she takes her findings to Wainwright he is again dismissive. Research leads the women to find that the serial killer's first victim was Julie Oakwood during the war, and from the leads this gives, Susan makes a final journey to unmask the culprit.