Westworld and Game of Thrones Easter Egg and Cameo from the Creators of Game of Thrones! HBO fandoms collided when a Game of Thrones Easter egg unexpectedly popped up in Westworld Season 3, Episode 2 “The Winter Line.” The episode highlighted cameos from Daenerys Targaryen’s (Emilia Clarke) beloved dragon, Drogon, and the GoT showrunners, David Benioff and D.B. Weiss. © All rights reserved by HBO