Cordelia and Wesley mention that the hotel bellhop's name was Frank Gilnitz. "Gilnitz" is a name that was often used for incidental or unseen characters on The X-Files (1993) (usually with the first name John); it became a running joke on that show. The name was an amalgam of the names of longtime X-Files writers John Shiban, Vince Gilligan, and Frank Spotnitz. The writer of this Angel (1999) episode, Tim Minear, was a writer and story editor for "The X-Files".
When the bookstore owner, Denver, asks Angel how old he was when he was made, Denver suggests that he was just over 30. Angel looks offended and says no. At the time of filming this episode David Boreanaz was 31, though the character of Angel was turned into a vampire at 26, supposedly staying that age for eternity.