The Count begins to think about Haydée in a romantic light. He realizes that he might have feelings for her in the way that he used to have feelings for Mercédès.
Fernand bursts into the Count's house and challenges him to a duel. He's super mad that his son didn't go through with the duel.
Fernand wants to know who the Count really is.
The Count quickly changes into the clothes of a sailor, and, completely shocked, Fernand realizes that the Count is really Edmond Dantès.
Fernand runs home to find his wife and son leaving him for good.