Spoilers ahead from "Game of Thrones" Season 7, Episode 5, "Eastwatch."

It was a BIG deal. Samwell Tarly missed it (and also the deaths of his father and brother), but a major piece of the plot was just revealed on "Game of Thrones."

At the Citadel in "Eastwatch," Gilly read off Seven Kingdoms trivia while Sam tried to do his boring work and stewed over being blown off by the old maesters in his quest to help defeat the White Walkers.

Gilly asked Sam for the definition of "annulment." He answered that it's when a man sets aside his lawful wife. Gilly then reported that High Septon Maynard -- who recorded everything, including his own bowel movements -- "says here that he issued an annulment for Prince Rhaegar and re-married him to someone else at the same time in a secret ceremony in Dorne."

Sam cut her off right there -- it's not like he'd know that was connected to Jon Snow, or could somehow intuit its greater meaning -- but fans immediately perked up their ears. That's brand new information!

Rhaegar was married to (poor, innocent) Elia Martell. If that marriage was somehow annulled, and he got remarried, that "someone else" could only have been Lyanna Stark. And since Lyanna died just after giving birth to the guy we know as Jon Snow, that means Jon was the legitimate son of Lyanna and Rhaegar. It's a bit convenient to the plot -- and super inconvenient to poor Elia Martell, who got ditched by her husband, and saw her children murdered, then was raped and murdered herself by The Mountain.

#EliaDeservedBetter

Seriously, though, what were the grounds for annulment? Rhaegar and Elia had two kids together. Are fans just so happy for Jon to have a strong claim to the Iron Throne that they'll blow off this plot hole?

Anyway, Jon being Prince Rhaegar's trueborn son gives Jon a stronger claim to the Iron Throne, but Robert's Rebellion -- and Cersei and Jaime's illegitimate children on the Throne -- show that claims mean nuthin'. You have to WANT the Throne and fight for it. Stannis Baratheon had a better claim than the illegitimate kids, but he lost the battle. Maester Aemon Targaryen had the strongest claim of all, but never wanted it. Jon may have the bloodline of a king, but he does he even want the job? Besides, if this is all about "breaking the wheel," it makes more sense if he and Daenerys Targaryen team up to break down the Iron Throne and use the pieces of Valyrian steel to fight the White Walkers. As that fan theory posits.

Jon seems close to learning the truth that he's a Targaryen. Bran Stark knows the truth, having seen his birth in a vision, and Drogon seemed to sense a fellow Targ. There's a lot of information flying around, between Bran's visions, the intel at the Citadel, and the record-keeping at Winterfell. It's only a matter of time before someone stumbles on the full story and shares it with BOTH known Targaryens. Plus, the recent HBO leak may have confirmed who is playing Rhaegar Targaryen on screen, possibly in another Bran vision, and since there are only two episodes left, he'll be coming pretty soon.

"Game of Thrones" Season 7 continues with Episode 6 on Sunday, Aug. 20 at 9 p.m. on HBO.

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Game of Thrones TV Show Poster
Game of Thrones
HBOTVMAApril 17, 2011
Based on 12 critics

Noble families in the seven kingdoms of Westeros vie for control of the Iron Throne. Read More

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