'Gotham' Casts 'Game of Thrones' Actor Alexander Siddig as Batman Supervillain

League of Shadows leader Ra’s al Ghul hasn’t been Batman’s biggest villain in the movies, but in the comics and other media, he’s absolutely an arch nemesis. Now he’s coming to Fox’s Gotham, with Game of Thrones actor Alexander Siddig playing the part. Siddig played Prince Doran Martell of Dorne in the fifth and sixth seasons of Thrones.

Deadline writes that Gotham will soon return for the back half of Season 3, and that Ra’s al Ghul will show up quickly. “The character will be revealed on the show as David Mazouz’s young Bruce Wayne begins to finds out who is really behind the secret Court of Owls council that seems to run everything in Gotham,” the site writes.