Shadowhunters 3x19 "Aku Cinta Kamu" Season 3 Episode 19 Promo Trailer - To try and save Clary from Jonathan, Jace goes undercover. Back at the Institute, Isabelle, Simon and Luke race to find a way to finally destroy Clary’s bond with Jonathan. With time running out, can Isabelle create the solution before Jace’s cover is blown?