'Game of Thrones' War Is Here preview: 'Blackwater' battle video

The first video trailer for the highly-anticipated 'Blackwater' episode of Game of Thrones has been released.

Season two of HBO's fantasy drama has teased that 'War is Coming' and in next week's penultimate episode, the show will feature its first war scene with Tyrion and the Lannisters battling with Stannis's forces at Blackwater Bay and King's Landing.

Watch the 'Blackwater' trailer below:



Showrunners David Benioff and Dan Weiss have revealed to Entertainment Weekly that the battle scenes "exceeded our expectations", describing their visual effects team as Oscar-worthy.

"'Blackwater' has far more VFX shots than any other episode we've done. We try to avoid excessive VFX on the show, but with 'Blackwater' there was no alternative," said Benioff. "Steve Kullback and Rainer Gombos look over a large team of tech wizards and what they've accomplished is, in our completely unbiased opinion, some of the best effects work in television history.

"It's a monster episode, we all knew that going in, but foreknowledge doesn't diminish the workload.

"'Blackwater' is essentially a short feature film, so [the team's] ability to get the job done on a TV schedule is astounding."

Game of Thrones author George RR Martin penned the script for the 'Blackwater' episode. "We wanted to give him 'Blackwater' to write because no-one writes better large-scale battles than George," said Benioff.

Game of Thrones continues on Sunday nights on HBO in the US. It airs on Mondays at 9pm on Sky Atlantic in the UK.