Game Of Thrones Season 7: 15 Best Internet Reactions To Dragonstone

5. Is That You, Professor Slughorn?

If you felt a disquieting familiarity creeping over Sam's scenes with Jim Broadbent's Archmaester Ebrose, you definitely weren't alone. A young upstart student begging for access to restricted magical information from an unwilling teacher who looks suspiciously like Horace Slughorn? Someone has been watching Harry Potter & The Half-Blood Prince.

Though Sam eventually had to just go around the whole permission thing, there was a much easier way for him to butter the Archmaester/Potions Professor up to gain access...

And for all of the apparent wealth of knowledge the Maesters protect in the Citadel, there's a pretty significant absence of a pretty key discipline that would have made everyone's life a hell of a lot better: