The season 6 premiere of Game of Thrones served up a massive twist concerning Melisandre, the Stannis-beguiling priestess played by Carice van Houten.
At the end of the episode, titled 'The Red Woman', she removes a necklace which she always wears, which appears to transform her into an ancient, wizened old woman.
But you've got to get up earlier than that to catch out die hard Thrones fans, who were quick off the mark to point out Melisandre doesn't always wear the magic jewellery.
As expected the internet has erupted with theories, some rushing to the defence of the show and pointing out some possibilities to cover what looks like a pretty bad continuity error.
But if you weren't satisfied with that, a Reddit user called brashendeavors user has a theory for what is going on that spans all the way back to season 2. He argues that Stannis' wife in that very scene saw Melisandre in her natural form all along;
"The only person to see her like this is Stannis wife Selyse. Selyse has this strange expression the entire time. Like she cannot look directly at Melisandre yet also cannot look away. At first you think it is that of a religious "uptight" person seeing a naked and very sexual woman. But if you rewatch the scene, and "pretend" to yourself that Selyse is seeing Melisandre as she actually appears, it actually fits better. WE still see the seductress, Selyse sees the hag. She is horrified yet fascinated and not at all shocked. She knew all along (just like she knows the true fate of her daughter), Melisandre explains she does not need to use her "tricks" on the true convert (Stannis is NOT a true convert but his wife is.)"
That seems a little convenient, given that keeping the viewer in the dark isn't a technique the show has used before.
Perhaps they were saving the spoiler for now. Or, as another user has suggested, clearly desperately in search of answers;
"Selyse is a true believer and sees Melisandre as her ideal form in the light of the lord without the need for glamours/tricks."
The final word was had by a Reddit genius, who summed up the dilemma eloquently;
"It's either rubies or boobies, not rubies and boobies."