Mark Gatiss returning for Game of Thrones season 5 

\'Sherlock\' actor returning to \'Game of Thrones\' for season 5

The Iron Bank is going to keep a close eye on its investment in Westeros.

Mark Gatiss is set to reprise his role as Tycho Nestoris, the world’s most fearsome banking executive, in the fifth season of HBO’s fantasy hit. The

co-creator, writer, producer and actor is expected back on the

debut last season in the episode “The Laws of Gods and Men” where his Braavosi bank team agreed to fund Stannis Baratheon‘s war effort to capture the Iron Throne from Lannister control (the Lannisters are in heavy debt to the Iron Bank, which will stealthily fund a debtor’s enemies if they are not repaid in a timely manner). At the time, it wasn’t clear if the guest appearance was a one-time thing, and producers haven’t previously said whether he’ll be back one way or another.

Gatiss is set for another busy year, splitting his work on

which he describes as having a “darker” fourth-season plan.

production in Croatia, earlier this week there were reports claiming that a key outdoor scene from George R.R. Martin’s

focusing on Lena Headey as Cersei Lannister was held up due to a conflict with a Dubrovnik church. (I don’t recommend searching for this spoiler-filled news unless you have read the book.) At the HBO Emmy party Monday night, producers told me that the snag was “old news” and that a new location for the sequence (which isn’t shooting for at least another month) has long been secured.

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