To avoid an international conflict, Peter and Neal have to find a thief who is stealing pieces to a valuable collection.

Neal helps an old friend whose daughter has been kidnapped, without realizing that it's all a trap from an old enemy.

Neal and Alex attempt to recover a music box from the Italian Consulate. Peter and Diana try to take down Fowler

Peter sends Neal back to school after someone copycats one of his old schemes. Alex returns with some bad news. Diana discovers the music box is hiding something. Peter and Diana set out to find the missing key, which is the last piece of the music box that Alex gives Neal before leaving for Italy. Aidan Quinn guest stars as a criminology professor.

Neal orchestrates an elaborate con to bring himself face to face with Kate's murderer.

Peter goes back to the time he arrested Neal for the first time. In the meantime, Neal remembers meeting Kate and Mozzie.

Peter and Neal assume each other's identities to uncover a collusion scheme.

Neal gets closer to finding out the truth about Kate's death.

The team investigates a series of museum heists that target rare artifacts.