Following the return of HBO's Game of Thrones last night, a new preview video for season 7's second episode teases rising tensions and escalating violence in Westeros.

Game of Thrones Episode 7.02: "Stormborn" synopsis (via SpoilerTV): "Daenerys (Emilia Clarke) receives an unexpected visitor. Jon (Kit Harington) faces a revolt. Tyrion (Peter Dinklage) plans the conquest of Westeros.

Written for television by Bryan Cogman; directed by Mark Mylod."

Game of Thrones Episode 7.02 will air on Sunday, July 23rd on HBO. What did you think of the season 7 premiere episode?