6 important things you probably missed on this week's 'Game of Thrones'

Helen Sloan/HBO

Gwendoline Christie as Brienne of Tarth on "Game of Thrones."

Warning: spoilers ahead for Sunday's episode of "Game of Thrones," "No One."

"Game of Thrones" staged several reunions on this week's episode.

Brienne (Gwendoline Christie) arrived at Riverrun and met up with Jaime Lannister (Nikolaj Coster-Waldau), revealing some interesting layers to their relationship. Meanwhile, Mereen was under siege by the returning slave masters, but Daenerys Targaryen (Emilia Clarke) arrived in the nick of time. Sandor Clegane (Rory McCann) caught up with the men who savaged the sept that took him in and settled the score. He also ran into an old nemesis. And Arya (Maisie Williams) came face-to-face once again with The Waif (Faye Marsaye), who returned to finish the young Stark off.

With all that to pay attention to, there may have been some details that viewers didn't catch.

Here are six important things you probably missed on this week's "Game of Thrones":