During the dance, the music playing in the background matches the wolf motif of the episode, with "Hungry like the Wolf" by Duran Duran and "Maneater" by Hall & Oats playing while the main characters dance.
Nick says he banished his familiar to the Mountains of Madness. That's a reference to H.P. Lovecraft's book of the same name.
Soundtrack The piece of music that is playing in Miss Wardwell's cottage is "serenade" by Schubert