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  ===Casting===
  "Battle of the Bastards" was the final episode for actor Iwan Rheon, who had played Ramsay Bolton since ''Game of Thrones'' third season. His first appearance was in "Dark Wings, Dark Words", as a then-unnamed "boy" who helps a captured Theon Greyjoy. Before he was cast as Ramsay, Rheon auditioned for the role of Jon Snow. In an interview, he described learning about his character's fate: "I had received half the scripts, five episodes, then I got the call. They joked, 'Isn't it great Ramsay ends up on the Iron Throne?' As soon as they said that I said, 'He's dead, isn't he?' It's cool. I've had four lovely seasons here. It's been great to be involved with such an amazing show. I think it's kind of right he goes down. Because what else is he going to do after this? He's done so many things. It's justified and it's the right thing to do. It's the right path. He's reached his peak. It's nice for the audience that he goes out on this high, if you will." In that interview, Kit Harington talked about Rheon: "I love Iwan's work. He's an incredibly detailed actor who's created a character who's remarkable and despicable."
  "Battle of the Bastards" was also the last episode for recurring character Rickon Stark (Art Parkinson), who had appeared since the series premiere episode "Winter Is Coming". In an IGN interview, Parkinson said that he was tipped off about his character's death: "Whenever I was told that I was coming back for Season 6, before they sent me through the scripts and stuff, they sent me through a ring just to say, 'Listen, so that you don't get a shock whenever you read the scripts, just know that you die this season. He continued, "Whenever I came back, I was excited to come back, and the scenes all seemed pretty amazing. I was so happy to re-embrace the character." According to Parkinson, he was sorry that Rickon would die but his manner of death was a compensation: "It was a cool death, and it was always going to be a good death, so at the same time, I was pretty happy."
  Another character departure was Smalljon Umber, played by Dean S. Jagger. In an interview, Jagger talked about his casting: "I prayed for it. When I heard I got the part my knees buckled. It was a life-changing moment." Before becoming a professional actor, Jagger dug trenches and worked at a mattress factory to pay his way through acting school and was a professional rollerblader. Ian Whyte also made his last appearance in "Battle of the Bastards" as the giant, Wun Wun; he had played Gregor Clegane during the show's second season. Special-effects supervisor Joe Bauer said about Whyte's casting as Wun Wun, "We wanted a large performer because somebody who would be 14, 15 feet tall would have more weight and mass to move around, and a person who's a normal size would have a very difficult time pulling that off".