HBO released a new, extended trailer for Game of Thrones this week.

Giving us more of a look at this science-fiction drama than the original preview, this video remains mysterious while still building intrigue for a series that's based on the best-selling novel "A Song of Ice and Fire."

Debuting on April 17, the show focuses on the struggle for the Iron Throne, as queen, knights, kings and renegades do battle for control of a fantasy universe. Will you tune in?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.