Aimee Mann sang two songs; "This is How it Goes" and "Pavlov's Bell" at the Bronze. During "Pavlov's Bell", a fight broke out between Spike and another vampire, the band stopped playing, Aimee Mann stopped singing for a second and after her performance, she spoke the line "Man, I hate playing vampire towns". Aimee Mann is the only singer/band featured on Buffy the Vampire Slayer (1997) to have a speaking part.
In one scene, the bouncer refers to Spike as "a Billy Idol wannabe," and Buffy starts to say that Billy Idol actually stole the look from him (implying Spike had told her this in conversation at some point). In Season Five's Fool for Love (2000), Spike's resemblance to Billy Idol was depicted (though not acknowledged in dialogue) during his flashback fight with the Slayer Nikki Wood in 1977, at which time Spike's attire and hair mimicked Idol almost perfectly, several years before Idol's fame.
Willow refers to The First as the "Big Bad" - a term coined in the series and used since in other programs to describe the main antagonist of a season.
The female vampire that accosts Spike in the Bronze suggests "I take him, you take her?" while looking at a couple, just as Drusilla did in Crush (2001).
This line of Anya's was cut when she tries to explain why she is in Spike's room: "I... am here, obviously, because of the reason which I am about to tell you, with the following words, and that reason is... uh, clearly and obviously too, um... sex."