Diagnosis: Murder (1993)

S08E20 Deja Vous - Deadly Mirage (1)

Dr. Mark Sloan is unsettled to discover that his son, Lt. Steve Sloan, is developing feelings for a woman who strikingly resembles his late girlfriend. This revelation leads Mark to obsessively observe his neighbors with binoculars, and he soon becomes convinced that one of them is involved in a murder.