content: 
  ===At Riverrun===
  Captives Martyn and Willem Lannister are slain by Lord Karstark and his men. Despite Talisa, Catelyn, and Edmure entreating Robb to hold Karstark prisoner, he personally executes Karstark.
  The Karstark forces abandon the Northern army, and Robb tells Talisa his new plan to attack Casterly Rock, the Lannister ancestral home, and forge an alliance with Lord Frey, whose daughter he was to marry.