HBO
George R.R. Martin reveals how many seasons and episodes House of the Dragon will have in total
The author of Fire and Blood, the novel on which House of the Dragon is based, confirms how many episodes the HBO series will need to tell Dance of the Dragons.
If things are so convoluted that we need a family tree of the Targaryen family with 8 episodes, just imagine with 40. We didn't pick a random number. That's the number of chapters the series is aiming for. This has been confirmed by George RR Martin, the author of the A Song of Ice and Fire saga (Game of Thrones) and of Fire and Blood, the book on which HBO's fiction is based.
Martin has confessed that it is going to take four full seasons of 10 episodes each to do justice to the Dance of the Dragons, from start to finish." This a statement with which the novelist anticipates HBO itself, who until now had only confirmed a second season. In any case, seeing the success of the first one (which has beaten all the records of Game of Thrones), nobody will be surprised by the news. The story of the Targaryen succession will be extended until 2025 at least.
What is the Dance of the Dragons?
As we said before, the series is based on the book Fire and Blood. The novel narrates the rise to power of the Targaryens, from the time they survived the Doom of Valyria until their dynasty settled in Dragonstone, through the conquest of Westeros and the founding of the iconic Iron Throne. The term Dance of the Dragons alludes to the descendants of Viserys, who fought among themselves for power and waged a bloody civil war that nearly ended their house.
Considering the dimensions of the book (and that there is a second part on the way), it is not surprising that we will have three more years of The House of the Dragon. Its showrunners do not even rule out jumping into narrating the conflicts of other Targaryen generations also described in Fire and Blood. After all, they are all exciting, because "Madness and greatness are two sides of the same coin. Every time a new Targaryen is born, the gods toss the coin in the air and the world holds its breath to see how it will land."
Source | George R. R. Martin’s Not a Blog