Daenerys Suffers Her Final Betrayal
Jon goes to visit Tyrion who is awaiting his execution. The former hand to the queen warns Jon that there is no turning back with Daenerys and that she will never stop until "she rules them all." When Jon still seems reluctant to turn against the woman he calls his queen, Tyrion uses Jon's greatest fear against him: the idea that Daenerys may harm his family and friends. There's no love lost between Daenerys and Sansa, but Jon's very existence is a threat to her legitimacy and his family knows the secret of his parentage. Daenerys may kill them all to ensure that her place as queen is never in question.
Hoping to talk some sense into her (and forever trying to find the silver lining in a situation) Jon goes to see Daenerys. He finds her in the throne room of the Red Keep, all alone and standing before the Iron Throne. In a really sad way, it's a visual representation of Daenerys's current situation. She's lost pretty much everyone she loves for the throne and now it's the only thing she has. Jon pleads with Daenerys to show mercy for the Lannister forces. He mentions seeing the Unsullied killing unarmed soldiers and tells her that she has what she wants now. Shouldn't that be enough? But Daenerys doesn't see her actions as evil, she's doing it for the people. "The world we need won't be built by the men loyal to the world we have," she tells her nephew.
Realising that Daenerys will never stop and will only wreck havoc wherever she goes, Jon comes to a grim decision. When Daenerys begs him to be with her, pulling him into an embrace, Jon pacifies her saying, "You're my Queen, now and always." He pulls her into a kiss and, as her guard is down, kills her by stabbing her in the chest. Seemingly sensing his mother's distress as she fades away, Drogon bursts into the throne room. In his anguish, the dragon blasts the Iron Throne with fire, causing it to melt into a molten puddle. The last dragon cradles his mother with his talons and flies away, carrying her body away from the Red Keep forever.