Cat and Vincent realize they may need their secret weapon to defeat Liam on Beauty and the Beast. "Sins of the Father" is the 12th episode of the show's third season.
Cat isn't happy when Vincent gets caught trying to see the body on Beauty and the Beast. "Cat's Out of the Bag" is the ninth episode of the show's third season.
Vincent worries about whether Cat will arrive for their wedding on Beauty and the Beast. "Shotgun Wedding" is the eighth episode of the show's third season.
Vincent: Look, Catherine, you're right. As much as I want a normal life, I can't have it. I'm not normal and, like it or not, for the record I don't like it, I don't really have a choice. Cat: We don't have a choice. Vincent, you've been given a gift. It might not have started out that way, but it has become that and, if you think about it, it's really not much different from why you wanted to join the army or why you wanted to become a doctor. Vincent: Or why you wanted to become a cop. Cat: I keep saying, I really believe that were in this together for a reason. Not just for love. Vincent: Except, without that, I'd be lost. Cat: [Vincent helping her down] What are you doing? Vincent: [smiling nervously] I'm making sure you don't fall. [getting down on his knee] Will you marry me? Cat: [smiling] Yes.