And for extra credit:

There is a REAL prequel in development starring Naomi Watts. Few details have emerged but you can follow updates direct from HBO here. It will take place thousands of years before the Game of Thrones story we know.

There are four other potential spin-offs in the wings.

Though HBO is only moving forward with one prequel for now, there are four other projects that could still potentially get the green-light. Here’s what we know:

Prequel #2: Max Borenstein

Max Borenstein, a screenwriter for Kong: Skull Island and an upcoming Godzillamovie, is working on a prequel idea for HBO. He hasn’t said anything about his project, but he did speak to Creative Screenwriting about his experiences working on both smaller scale and big-budget projects. “Sometimes it makes sense for a studio to plug screenwriters who do smaller, dramatic pieces into movies that are of giant scale,” he said. “What they’d like to do is bring those giant-scale movies down to earth a little.”

Prequel #3: Brian Helgeland

Brian Helgeland, who won the Best Adapted Screenplay Oscar for L.A. Confidential (and, the same year, the Razzie for The Postman’s screenplay), is working on a prequel idea for Game of Thrones. More recently, he was behind the movie Legend, which starred Tom Hardy in dual roles as twins. He hasn’t talked about the project, but back in 2015 he said television wasn’t for him. “It’s only in the last four or five years that that’s become an option, but I’m not interested in TV,” he told Collider. “I want to make movies so I’m going to die with my boots on.”

Prequel #4: Carly Wray and George R. R. Martin

Carly Wray, a writer for The Leftovers and Mad Men, is working on a prequel idea with Martin. Wray hasn’t done much press around her previous projects—or around this one—but she is coming straight off another critically beloved HBO drama, so the transition would be pretty easy for her.

Prequel #5: Bryan Cogman and George R.R. Martin

Entertainment Weekly reports Bryan Cogman, a co-executive producer and prolific writer on Game of Thrones, is working on a fifth prequel. He worked with George R.R. Martin on the concept, but of course is tight-lipped about what the show is about.

Martin hinted at a fifth prequel series in the works back in May, without mentioning Cogman’s name. “He’s a really terrific addition,” Martin wrote on his LiveJournal. “A great guy and a fine writer, and aside from me and maybe Elio and Linda [who run Westeros.org], I don’t know anyone who knows and loves Westeros as well as he does.”