Mystic Falls is known for its town events, and this one, a formal ball held at Klaus' newly renovated mansion in the Feb. 9 episode ''Dangerous Liaisons,'' appears to have had the biggest budget. But what do we have here… ''Are they getting along? Or are they fighting?'' executive producer Julie Plec asks coyly. ''All we can say is that after a season of physical distance, they're dancing.''