Video! HBO's 'Game of Thrones'

Based on the epic fantasy novels by George R.R. Martin, "A Game of Thrones" is a new series on HBO about set in medieval times and deals with warring tribal families who vie for control over the Seven Kingdoms of Westeros -- a territory where summers are measured in years, not months, and where winters can extend for decades.

Enter the world of kings, queens, knights and renegades on Sunday, April 17 at 9:00 PM on HBO.

Catch a sneak peek!