Is this leaked video the first peek at Game of Thrones season 6?
WARNING: SPOILERS on season six. Don't read if you don't want to know!
Footage from the Spanish Game of Thrones set has been leaked and appears to show a sword fight from the upcoming sixth season.
Filming is underway at the Castillo de Zafra and on Tuesday Spanish fan site Los Siete Reino posted a video which appears to show two men fighting.
The video (scroll down to watch) is blurry and shot on a mobile from from very far away but another Game of Thrones fan site, Winter is Coming, has speculated that the men fighting are Ned Stark and Arthur Dayne and that the face-off is taking place outside the Tower of Joy.
There is also a woman present who they suggest is Ned's sister Lyanna.
Given that casting calls for Game of Thrones included a character called Legendary Fighter who "carries a hugely famous sword on his back" fans have speculated he is Ser Arthur Deyne, a member of King Aerys's Kingsguard.
The Huffington Post makes the link between what's happening in the scene and a story told by Ned Stark in the first book Game of Thrones.
Stark talks about a battle at the Tower of Joy, where Lyanna was taken after being abducted by Prince Rhaegar Targaryen.
As Ned arrived to save her he faced-off with three members of the Kingsguard including the aforementioned Dayne. During the fight five of Stark's party were killed but Stark himself was saved by Howland Reed.
When they entered the Tower they found Lyanna dying in a bed of blood. Before she died she made Stark promise something but he never revealed what.
The theory is that the secret related to Jon Snow and that he is the son of Lyanna and Rhaegar.
Meanwhile, the supposedly dead Jon Snow appears in sequences being filmed for season six in Belfast, although it is possibly he is still dead and will feature in a flashback.
Also The Hound actor Rory McCann has been spotted at the filming location.