10,000 B.C. actor Joel Fry has been cast in the key role of Hizdahr zo Loraq in the fourth season of Game of Thrones. The character first appears in the fifth book, A Dance of Dragons, which runs simultaneously with the fourth book, A Feast of Crows.
Hizdahr, as one of the Ghiscari nobles, meets Daenerys Targaryen in the city of Meereen. The city is the largest of the three Slaver Cities in Slaver’s Bay; we have already seen the other two, Astapor and Yunkai.