"Another Brick in the Wall"
From Tardis Wiki, the free Doctor Who reference
While working as the caretaker of Coal Hill School in the early 21st century, the Twelfth Doctor whistled the beginning of part 2 of "Another Brick in the Wall". (TV: The Caretaker)
Behind the scenes
"Another Brick in the Wall" is a song by Pink Floyd, from their 1979 album, The Wall.
