It sure looks like J.T. is trying to talks some sense into Vincent. Odds are pretty good the subject is Catherine!
Tough luck, J.T. Tess places the character under arrest in this scene.
Tess and JT are featured in this Beauty and the Beast scene. It's from the episode "Don't Die on Me."

Beauty and the Beast Quotes

Vargas:This is where he lives? A chemical plant?
Cat: He's a researcher, maybe he works from home?
Vargas: Or maybe it's a meth lab.
Cat: Just my type.

Everyone told me it was just a coyote or a bear. This thing I thought I had seen was just a result of my concussion or post traumatic stress. No, the men who killed my mother were beasts. I believed them. Until now.