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.
Winter Is Coming Ned is informed that a deserter of the Night's Watch has been captured. He takes his sons to witness Will's execution. Will reports that he saw White Walkers, but nobody believes him and Ned beheads him. When Bran asks his father about the White Walkers, Ned dismisses it as a madman's ravings, insisting that the Walkers have been extinct for thousands of years. Upon their return, the Starks find a dead stag, sigil (seal) of House Baratheon. A bit farther they find a dead dire wolf and her surviving pups. Noting that the dire wolf is the sigil of the Stark family and there are as many pups as the Stark children, they take the pups in as companions.