Gatiss of Thrones: HBO fantasy show casts Sherlock showrunner Mark Gatiss

The British actor, writer and producer will have a part in the fourth series of the HBO fantasy drama

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Casting news that brings together three huge television phenomena: Sherlock showrunner Mark Gatiss – who has also served as a writer on Doctor Who – has been cast in HBO’s Game of Thrones. 

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The British actor, writer and producer, who appears as Sherlock’s brother Mycroft in the BBC detective drama, will star in the fourth series of the hit US fantasy drama. 

While there are no further details of Gatiss’ role in Game of Thrones – which also stars Peter Dinklage, Emilia Clarke and Joe Dempsie – dedicated fans of both shows are advised to keep their eyes peeled at San Diego’s Comic-Con event this weekend, where both Game of Thrones and Sherlock are hosting panel sessions, with Gatiss in attendance at the latter. 

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The 46-year-old joins fellow series four newcomer Pedro Pascal, who will play Prince Oberon “The Red Viper” Martell. The pair climb on board the drama following the dramatic departures of Richard Madden, Michelle Fairley and Oona Chaplin last series in the infamous Red Wedding episode.