Annika reflects on Jekyll and Hyde as she and the team investigate a millionaire found dead in his own shark tank.

Tommy gets involved in a power game with fascists, freedom fighters and Boston gangsters. As the players plan to double cross him, Tommy visits an old ally in Camden.

When Gabriel’s chip is hacked, he’s shocked to learn that Mei Chen is not only alive, but possesses an even more powerful chip than his own.

When Beckett is assigned to protect Erik Vaughn, a charming billionaire entrepreneur whose life is in danger, she’s forced to reflect on her relationship with Castle which has begun to…