`` Sherlock '' actor Mark Gatiss enjoyed his murderous role in the Red Wedding . `` Sherlock '' actor David Bradley just announced as new Thrones cast member . Gatiss is not allowed to reveal anything about his character .
`` Thrones '' actor David Bradley enjoyed his murderous role in the Red Wedding . `` Sherlock '' actor Mark Gatiss just announced as new `` Game of Thrones '' cast member . Gatiss is not allowed to reveal anything about his character .