I don't watch the show (although I plan to at some point), but it seems Gatiss talked about his role in an interview at the end of February, so it'd be odd if his involvement had changed not two months later: http://winteriscoming.net/2014/02/24/mark-gatiss-talks-game-of-thrones-with-metro-uk/ Especially since I'm assuming that season 4 would already have been shot at that point. I don't know the books either, but maybe his character will only appear in later episodes?

Oh, and I wouldn't count on IMDb being terribly accurate. Any user can make suggestions to have credits changed or deleted, and I've found that most of the time they're accepted by the admins. I'm not sure just how thoroughly the sources for update requests are checked over there. It's a little bit like Wikipedia, really.

Last edited by TeeJay (April 20, 2014 7:59 am)

I love the show, but am lagging behind because Hubby refuses to watch it in English. Rightfully so, I think. The plot is very ... HBO-ish, which means compact, multi-layered, with loads of details that will become important three seasons later without ever being explained again. I can understand why he insists on following that in German.

I really hope Mark is still in it.

I squealed like a little girl when I saw him in the previews!  

Mark will be back to Game of Thrones for the fifth series 

http://insidetv.ew.com/2014/08/27/mark-gatiss-season-5-thrones/?hootPostID=58e0e155b9d69723bb25ac00792f4d9f