Sherlock actor cast in mysterious role for Game of Thrones S4

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Jul 17, 2013, 2:00 PM EDT

Sherlock star Mark Gatiss has been cast in the upcoming fourth season of HBO’s Game of Thrones. We only have one question (okay, we have MANY) which is: as whom?


The news came courtesy of James Hibbert over at Entertainment Weekly's Inside TV.

The role for which Gatiss has been cast is currently being kept quiet, most probably for a further reveal by the showrunners at the Game of Thrones San-Diego Comic Con panel that will take place this upcoming Friday.

Mark Gatiss not only stars on Sherlock as the titular high-functioning sociopath’s (Benedict Cumberbatch) brother Mycroft Holmes, but he’s also the show's co-creator along with Stephen Moffat. Incidentally, Sherlock will be making its first SDCC appearance in a panel this Thursday which will be moderated by ... James Hibbert! (He'll probably try to squeeze some info out of Gatiss ahead of the Thrones panel.)

Gatiss has also written a few Doctor Who episodes since the series’ revival in 2005 and starred in one. He even appeared on Being Human's (U.K.) fourth season as a vampire.

So just who could Gatiss be playing in the fourth season of Game of Thrones?

We’d put a few golden dragons on the role of Mace Tyrell—although the character of Mace is a little bit more rotund in the books—father of Ser Loras Tyrell (Finn Jones) and Margaery Tyrell (Natalie Dormer), son of the absolutely wonderful Queen of Thorns (Dame Diana Rigg) and Lord of Highgarden. We know the character will finally make his long-delayed appearance in the fourth season.

Then again, he could also be playing one of Balon Greyjoys’ three other brothers (our pick being Aeron Damphair), although it’s unlikely any of them will be cast for this upcoming season—though we could also be wrong about that.

Another possibility is that Gatiss could be playing the role of Styr, the Magnar of Thenn and one of Mance Rayder’s (Cieran Hinds) trusted lieutenants.

Gatiss could even be appearing in a more small-ish role, such as the new High Septon, or even one of the many, many, many Freys. Heck, he could even be playing Coldhands, a character from the books we haven't seen just yet. The possibilities are at once endless and exciting.

What do you think? Are you excited that Mark Gatiss will be on Game of Thrones? Which role do you think he could be playing?

(via Entertainment Weekly)