HBO releases new trailer for 'Game of Thrones' season 4

HBO has released a new trailer for the upcoming fourth season of Game of Thrones. The trailer features a distraught Sansa Stark (Sophia Turner) in King's Landing with Tyrion Lannister (Peter Dinklage), a troubled Jon Snow (Kit Harington) still in the company of Ygritte (Rose Leslie) and the wildlings, and Daenerys Targaryen (Emilia Clarke) on the warpath accompanied by her dragons. The fourth season is roughly based on the second half of the novel A Storm of Swords in George R.R. Martin fantasy series A Song of Ice and Fire, and will pick up where the third season left off. The trailer reveals that themes of revenge and justice will dominate this season's plot lines. Game of Thrones season four will premiere on Sunday, April 6 at 9 p.m. EDT.