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.
Theon Greyjoy Ten years before the events of the series, Theon was taken hostage by Eddard Stark. He would have been executed had his father Balon displeased King Robert Baratheon. Theon was raised at Winterfell with the Stark children and developed a close friendship with Robb Stark. As an adult, Theon was arrogant, cocky, and proud until being imprisoned by Ramsay Snow, who is the eldest and bastard son of Roose Bolton. During the imprisonment, Ramsay severely tortured Theon physically and psychologically before emasculating him and mockingly changing his name to "Reek".[6]