It has been confirmed by HBO that the fourth season of Game of Thrones will start screening in the US on Sunday 6 April. The first trailer will be shown on the channel this Sunday, 12 January, before the premiere of new drama True Detective, and presumably will appear online soon after.

Sky will also start to show Game of Thrones Season 4 from the day after its US debut of Monday 7 April. It will show the first episode at 9pm on Sky Atlantic HD and every Monday after. Users of Now TV will also be able to sign up to the Entertainment package to access Sky Atlantic for each broadcast and catch-up episodes.

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At present, that costs £4.99 a month with no contract. That will rise, however, after 31 March, so you'll need to buy a month's pass before then.

New cast members include Sherlock and Doctor Who writer and star Mark Gatiss, Michelle MacLaren from Breaking Bad and The Walking Dead, and Indira Varma from Luther.

It has also been revealed by HBO that Boardwalk Empire Season 5, which will air in the autumn, will be the last.