In one scene in the next “Doctor who” where on the “Mummy on the Orient Express… Where The Doctor takes on a trip on the Orient express with Clara… Where the relationship from the last episode” Kill the Moon” between those two has change from where this trip is the resolved… In this one scene Foxes sings during the he guest of the Express dances. After giving a Jazz Ballot.. as part of the production she gets to explore the sets like playing with the Tardis consoles and having fun in a break in production filming… like a kid with a magic box, sharing that experiences..