Before the FBI agent (Eliza Dushku) arrives at his apartment, Raj is reading 'New Moon', the second book of the Twilight series which deals with vampires (he hides it on the floor after the agent sits down). Dushku is well-known for playing vampire slayer Faith on Buffy the Vampire Slayer (1997) and Angel (1999). Sarah Michelle Gellar, who played vampire hunter Buffy on Buffy the Vampire Slayer (1997), would later appear in The Big Bang Theory: The Stockholm Syndrome (2019), the series finale.