 After realizing Michael wasn't the person he was told, Grey agrees to help Michael take down Card.Returning to Miami, Grey assists Michael in gathering intel on Card, but when Card discovers Grey's betrayal, Card kills Grey, makes it look like a struggle and tries to convince Michael that they can do "great things" and has always been proud of him.However, Michael, unable to forgive Card for what he did and knowing what he's capable of, shoots Card through the head, killing him in cold blood.