In An Unexpected Journey, the first part of the trilogy of Hobbit films, the Company of Thorin are captured in the Misty Mountains, taken down to Goblin-town and brought before the Great Goblin, who recognises Thorin when he steps forward.
My question is, how? I seriously doubt that they'd met before, and I also doubt that the Great Goblin, or any others of his race, had spoken to any other Dwarves long enough to learn anything more than a general description before fighting would have broken out. As I recall, he also recognises him in the book. How did the Great Goblin know who Thorin was?