Classic, with ketchup, relish, onions, and mustard.
Of course, I regret going to a fast food restaurant again. I'm usually disappointed. In this case, it's clear that Burger King is skimping on the food and quality. I've tasted better boiled hot dogs, and I doubt the grill marks are authentic. They don't give you a full hot dog, either. They cut a wedge out of each dog, not just slicing it for cooking reasons or holding the meager toppings. The dogs look skinnier than they should, and are overwhelmed by the buns. Burger King should be called Hot Dog Pauper.