‘Sherlock’ co-creator Mark Gatiss joins cast of ‘Game Of Thrones’

Gatiss's role on the hit US fantasy series has yet to be revealed though...

Mark Gatiss, co-creator of Sherlock, has joined the cast of Game Of Thrones.

Gatiss will appear in season four of the hit US fantasy series, due to air next year (2014), Entertainment Weekly has confirmed, though the show runners have yet to reveal his role.

As well as creating BBC One’s Sherlock with Steven Moffat, Gatiss has appeared in the series as Holmes’s older brother, Mycroft. He’s also known for being a member of The League Of Gentlemen comedy crew and writing and guest-starring in several episodes of Doctor Who.

Season four of Game Of Thrones started shooting earlier this month (July). Another new addition to the cast is Chilean actor Pedro Pascal, who will play Prince Oberyn Martell aka The Red Viper. Show runners David Benioff and Dan Weiss describe the character as “sexy and charming, yet believably dangerous”.

Meanwhile, Gatiss will be back as Mycroft Holmes in season three of Sherlock, set to air later this year (2013). Gatiss discussed the character’s role in the new season during the Sherlock panel at San Diego Comic-Con yesterday (July 18).

“There’s been a lot of nice stuff [involving Mycroft],” he teased. “The big thing we wanted to explore – in the original story Watson’s reaction [to Sherlock’s fake death] was quite quick and he just forgives him. We thought that wasn’t right, so we wanted to explore how it affected all the regulars, really.”