As the Twelfth Doctor uses the screen on the TARDIS console, Clara is busy organising the TARDIS by putting labels on everything. She asks the Doctor, "How do you spell 'friction contrafibulator' there again?". The Doctor responds that it's spelt as it sounds, he then says, "Wait, hey, what are you doing back there?". She tells him that she's labelling everything and asks what he's doing. He explains that he's going through his Encyclopedia Creatura. Clara decides that "Encyclopedia Creatura" is hard to spell, so she labels it "Monster Files". She notices that the Doctor is looking at his file on the Boneless and asks if he created the file while he was stuck in the TARDIS and Clara was fighting the Boneless with Rigsy. He hesitates before saying no and quickly adds that very little is known about the boneless. He theorises that they can take the form of any flat object from a wall to a comic book.