Ice and Fire: A Foreshadowing offers footage from season 4 along with interviews with the stars in response to questions from fans submitted via Twitter.
The clip teases the Purple Wedding between King Joffrey (Jack Gleeson) and Margaery Tyrell (Natalie Dormer) with Charles Dance, who plays Tywin Lannister, revealing it ‘was like shooting a short film in itself’.
David Benioff, the show’s co-creator, claimed that Tyrion (Peter Dinklage) was in constant danger during the new series.
He said: ‘This is definitely the most dangerous season for Tyrion. It seems like in almost every episode he is in jeopardy of getting his head removed from his shoulders.’
Dinklage revealed that Tyrion is relegated to the sidelines in season 4.
He said: ‘Tyrion has never been faced with this much public humiliation, because he’s usually has an answer for it.
‘He’s usually centre stage and he usually is better at it than everyone around him.
‘This time around he’s left as an audience member.’
The cast also react to the carnage of the Red Wedding, reveal who their favourite character on the show is and chat about what they do off-set to occupy their time.
Emilia Clarke also reveals how Daenerys’ dragons are growing quickly with Ser Jorah Mormont (Iain Glen) warning her that they ‘can’t be tamed’.
New addition to the cast Pedro Pascal talks about playing Oberyn Martell, who he describes as ‘very, very dangerous’.
There are also more light-hearted moments with Dinklage and co-star Nikolaj Coster-Waldau (Jamie Lannister) doing a little dance to cheer the crew up.
Game of Thrones season 4 will premiere in the US on April 6, at 9pm on HBO.