What to Know About the "Game of Thrones" Spinoffs

After several false starts, the first official spinoff for "Game of Thrones" will be "House of the Dragon," a Targaryen-centric prequel. Set centuries before "Game of Thrones," the series is based on portions of "Fire and Blood," a spinoff book by George R.R. Martin that chronicles the rise and fall of the powerful, dragon-riding Targaryen dynasty.

Around 300 years before "Game of Thrones," King Viserys I intends for his daughter Rhaenyra to inherit the throne, but his second wife and their son have different ideas. What results is an inheritance crisis that divides the Targaryens, plunging Westeros into a civil war called the Dance of the Dragons with consequences that reach for generations.

Unlike "House of the Dragon," the still-untitled spinoff centres on Jon Snow is a sequel to "Game of Thrones," making it the first official foray further into the timeline. Not much is known about the show yet other than the fact that Kit Harrington is on board to reprise his role as Jon Snow. The show will reportedly follow Jon Snow, the last known person with Targaryen blood, after his self-imposed exile back to the Night's Watch.

As "Game of Thrones" viewers know, of course, that exile resulted from his assassination of Daenerys Targaryen, his lover who also turned out to be his biological aunt. Other details about the show, including its exact setting and its other characters, have not yet been announced.