where is robb stark in season 3 episode 1
Valar Dohaeris Robb Stark and his forces arrive at Harrenhal, where they discover that Gregor Clegane has abandoned it and slaughtered all the prisoners. Lord Roose Bolton gives sympathy to a still-grieving Lord Rickard Karstark who expresses his frustration that Catelyn Stark let Jaime Lannister go. Bolton assures Karstark that Jaime will be found soon, as his best hunter is after them. Robb stumbles across a survivor among the dead, a man named Qyburn.