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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.

Ra’s al Ghul first appeared in the Batman comics in 1971. He was played by Liam Neeson in Christopher Nolan’s Bat-trilogy kickoff Batman Begins in 2005. Gotham, which premiered in 2014, has so far included villains like Clayface, the Riddler, Mr. Freeze, Hugo Strange and the Penguin.

Siddig, who played Dr. Julian Bashir on Star Trek: Deep Space Nine, found a higher place in our hearts last September when he was so bold as to criticize the “not great business sense” behind the juggernaut that is Game of Thrones. He added of his time on the show, "I don’t like walking around with secrets. I can’t stand it. You just make a deal with the devil.”

Hopefully it's not so hard on him this time. Next, watch Robin Lord Taylor tell Fuse how his experience growing up gay and overweight helped him tackle the Penguin: