The show "Game of Thrones" is a TV show made by David Benioff and DB Weiss. I need to watch it more sometime, I haven't really watched it much
I've watched and read the books. What interests you about the show?
Oh, I just like the concept of it. It's adapted from "A Song of Ice and Fire" by George R R Martin, which is a series of novels, the first one is "A Game of Thrones".
Yes, Martin is an interesting writer, and all of his fans are anxiously awaiting the next book in his series.
It started on HBO in the U.S. on April 17, 2011, but it's seventh season ended on August 27, 2017.
It's hard to believe it's been this long. I don't know much about the production. What can you tell me about it?
They're going to end the series with the eighth season in 2019.
So we have to wait another year. I've heard there might be a spin-off series. I'm sure HBO will want to make more since it's been successful. 
There's a bunch of plotlines in the series. It has a huge ensemble cast. It is set on the made up continents of Westeros and Essos.
Yes, Martin has created a huge fictional geography. Some of those different plot lines might work for a spin-off.