Once again the mysterious Moriarty has his sights set on Holmes and Watson.
The new Person of Interest is a young trader who has become involved in a multi-million dollar financial scam, and Reese has to pose as a wealthy investor to watch their client.
Holt Neuro runs some tests on Kate's "little sister". Michael spots a man drowning in a nearby river and brings him in. There is more to this man than meets the eye.