In the nightclub, Lilah refers to vampires as 'undead Americans', echoing Buffy's words in When She Was Bad (1997), in which Buffy sarcastically asks Angel if 'vampire' was offensive, and if she should use the term 'undead American'.
When Cordelia sees the modified Geiger counter, she exclaims "Shiny!"-a phrase commonly associated with the Joss Whedon show Firefly (2002).
In this episode it is revealed that Connor has extraordinary hearing. Not surprisingly, as his parents are vampires.
The possibility of Angel and Connor having a deeper connection/relationship is shown in this episode. But, as seen through the rest of this season and season 4, other people's agendas cause interference.
When discussing the fact that Connor is on his own in Los Angeles, Fred says, "Okay, so he survived an unspeakable hell dimension. Who hasn't?" This is a clear reference to her time in Pylea. Among the others of the group, all had spent some time in Pylea, with Groosalugg and Lorne both having been born there and Angel and Gunn having gone to save Cordelia who had been sucked in. Furthermore, Angel had previously spent a century in Acathla's Dimension.