Steve says that when Roger (as Valik) is thinking about him because his scar burns. This is a reference to Harry Potter.
The ending of this episode is similar to Silence of the Lambs. In the film, Hannibal gets off the phone and follows Chilton. At the end of this episode, Roger is seen getting off the phone and follows Steve and Hayley.
Roger's paraphrased quote "We are the music makers. We are the dreamers of dreams" originated in the poem Ode by Arthur O'Shaughnessy. The film Willy Wonka and the Chocolate Factory also paraphrased the quote.