HBO's "Game Of Thrones" is mourning the off-screen passing of cast member, but has said that the show will go on. According to "The Belfast Telegraph," JJ Murphy, died Friday, just four days into filming his scenes for the show's upcoming fifth season. He was 86. Murphy had been tapped to play Ser Denys Mallister, the most senior member of "Game Of Throne's" Night's Watch group. He was expected to film more scenes for the show. Producers say they will not recast the role. The cause of his death is unknown.