Season 7: Episode 18 - IDENTITY CRISIS

IDENTITY CRISIS: A murder on a subway takes us into the adventurous world of the "Confidence Game". What appears to be a dead old man is actually a young woman in prosthetics and make-up. The trail gets even stranger when trace from a German U-boat and a frozen gunshot wound is found on the victim. Mac and the team find the killer and realize he had no idea the old man and young woman were not the same person. Jo makes a tough choice and decides to tell her adopted daughter, Ellie, who her real mother is - a woman sentenced to life in Federal prison - and the most difficult part is to tell Ellie that Jo was the one who put her away.