George R.R. Martin has released hints on his blog about an actor joining the second season of the HBO series, and the brilliant minds at Westeros.org have deduced that the actor is John Stahl. But we don’t yet know which character he’s going to be portraying!

George R.R. Martin gave the following clues as to the identity of the actor:

Vengeance is his. Frankenstein and Nessie are friends of his, but don’t say he’s never been human… but was he Irish or Eskimo? Born in Scotland, that we know. He’s been a fisherman, a minister, an inspector, and a malingerer. Down the slippery slope he slides, toward the kingdom of bones, but will he lose his head?

Westeros.org deduced that John Stahl is the actor in question, and speculate that he’ll be playing Qhorin Halfhand. And indeed, there is only a limited number of substantial roles left that haven’t already been filled. Any suggestions?