HBO have released the first trailer for Game of Thrones Season 4. The new season arrives Sunday, April 6th. Based on George R.R. Martin'sA Song of Ice and Fire the Emmy-winning fantasy series chronicles an epic struggle for power in a vast & violent fantasy world. Peter Dinklage, Lena Headey, Emilia Clarke, Nikolaj Coster-Waldau, Kit Harington, Natalie Dormer, Maisie Williams & Sophie Turner all star. Hit the jump for the details.