The phrase is uttered in a scene involving characters Samwell Tarly (John Bradley) and Archmaester Ebrose (Jim Broadbent), who is tasked with training Tarly at the Citadel. Tarly voices his intention to access the ‘restricted area of the library’ in order to acquire the material that could help him with his Archmaester training. However, he is denied access by Ebrose.
Fans of Harry Potter will recognize ‘the restricted section of the library’ as the term for the section of the Hogwarts library in which dangerous magic books are stored. In ‘Harry Potter and the Half-Blood Prince,’ the teenage Voldemort asks Professor Slughorn for access to the restricted section.
The funny thing is, Slughorn is played by…. you guessed it: Jim Broadbent.