Charlie is first introduced when Vincent Keller is found unconscious at the scene of an arson, and admitted to the hospital. Charlie shows up with Aaron, hoping to find out about the arsonist who set the fire. Vincent is introduced to Charlie and Aaron as "Victor," an undercover officer, by Gabriel Lowan and Catherine Chandler. Gabe stonewalls them, saying "Victor" can't remember what happened. When Aaron becomes angry and demands answers, Charlie gets him to calm down. He then reveals that Aaron's last name is Keller, and Vincent, Catherine, and Gabe realize Aaron is Vincent's nephew. Gabe has Charlie & Aaron leave after this in order to protect Vincent.