Game of Thrones Season 4, Episode 6 (“The Laws of Gods and Men”) saw the appearance of Sherlock star Mark Gattis in the role of Iron Bank of Braavos representative Tycho Nestoris (though he wasn’t named in the episode). It was a nice cameo, but will Mark ever be back on GoT?
Entertainment Weekly spoke with the episode’s writer, Bryan Cogman (who also penned Episode 4 of this season, “Oathkeeper”), and asked him that very question. “I cannot confirm or deny future appearance [by Gattis],” Bryan coyly says. “But I personally would love to see him again and the Iron Bank is an important part of this world.”
We’ve heard the Iron Bank mentioned several times this season, and it feels like Stannis getting a loan can’t be the only payoff for all of the times they’ve had their name dropped on the show. It’s been implied that the Crown owes a lot of money to the Iron Bank, and it’s also been revealed that the Lannisters are broke, so we have to believe that eventually the Iron Bank is going to come calling for its money. And when they do, we bet Mark Gattis will be there.
Source: Entertainment Weekly