Hold your breath! Game of Thrones cast spills some 'Season 5' secrets

With season five set to debut April 12 in the US, the Game of Thrones cast didn't reveal any spoilers on the red carpet in London, but they did admit HBO has pulled out all the stops to make this season bigger and better than ever. The season five of popular fantasy drama "Game of Thrones" premiered at the Tower of London. It marked the first time that a new season of the HBO series has gotten its world premiere in Europe.