There is still a lot of mystery surrounding Ian McShane’s upcoming role in Game of Thrones Season 6. His character doesn’t even have a name yet! But the actor let drop a few small details about his involvement in the upcoming series. It may not mean much to the casual viewer, but to the devoted Game of Thrones book readers, McShane just basically confirmed a long-cherished book theory about the return of a fan favorite.

The actor gave Pop Goes the News two pieces of information. First of all, McShane will only appear in one episode. Secondly, he told them, “I am responsible for bringing somebody back that you think you’re never going to see again. I’ll leave it at that.” More on why that’s a thrilling reveal after the spoiler warning.

Ever since McShane was cast in Season 6, there has been strong speculation that he would be playing a thus far unnamed character described in the casting call as “a man in his 40s or 50s. A gruff ex-soldier who found religion. Now a no-nonsense rural priest who ministers to the poor of the countryside. He’s salt-of-the-earth man who has weathered many battles.” Book readers have concluded that this description coincides enough with Septon Meribald, a character from A Feast for Crows. (To be more accurate it’s probably a hybrid of Meribald and someone called Elder Brother.) McShane’s little hint pretty much confirms that assumption because Septon Meribald is key in the alleged reappearance of, oh yes, the Hound.