The Shadowy Third

At a home for the elderly young nurse Maureen is having an affair with the much older Dr Evans, one of the patients, Margaret Randolph, is keen to tell her about her own youth when she was a nurse in the same place, where she was put in charge of looking after the "emotionally challenged" wife of head of the hospital Dr Maradick who is convinced that her husband killed their young daughter. Maureen is convinced of Mrs Maradick's insanity because she sees the child around the hospital but when she learns that the child did die she starts to doubt her own sanity.