Calvin Warrington-Heasman is a stunt man who has been in a slew of gigantic films. His impressive resume includes Transformers, Jason Bourne, Wonder Woman, Pirates of the Caribbean, Avengers, and many more. On Game of Thrones, Warrington-Heasman was involved in the stunts for several episodes, but his big moment in the sun came in the episode “Kill the Boy.” It was here that Warrington-Heasman got to play one of the Stone Men. He’s the one who attacks Tyrion and Jorah Mormont, infecting Jorah with greyscale in the process. The makeup process to turn Warrington-Heasman into a Stone Man took about four hours to complete. The look was based on an advanced version of the greyscale that Shireen Baratheon’s has on the side of her face. As a model, the team used cracked riverbeds and elephant skin to give them an idea of where they wanted to take the look.