'House of the Dragon' HBO Will Season 4 of House of the Dragon be its last? HBO boss Casey Bloys addressed that question during the premium's cabler's presentation Thursday in New York. It was announced earlier Thursday that the Game of Thrones prequel series had been renewed for a fourth season for premiere in 2028. Showrunner Ryan Condal, in comments last year, was emphatic that the series would conclude with Season 4, but there was no mention of that when HBO renewed it earlier today.