WATCH: Game of Thrones production video

A new thirty minute behind-the-scenes video shows the massive scale of the production for one of the defining TV sensations of our time, Game of Thrones.

'A Day in the Life' highlights the tremendous scope of the production on Season 5 of the hit fantasy, which will air on Sky Atlantic on April 13.

Featuring filming in Croatia, Spain and Northern Ireland, massive sets and personal drama, the special offers new insight into what goes into the making of Game of Thrones and should whet fan's appetites while waiting for the premier. Check out the special and trailer for Season 5 below!