A final, rapid-fire montage features more of Dumbledore's wise words: "You have no choice, you must not fail…", Harry getting all proactive ("Fight back, you coward!" he screams at an enemy). And a parting line from Albus: "Once again, I must ask too much of you Harry."

While the trailer had a lot of previously seen footage, the long wait for the movie means more CGI has been completed. After all the talk about each Potter sequel being 'darker' than the last, this one finally looks like it might deliver something torrid and twisted.