According to James Marsters, he burnt his hand quite badly while filming the scene where Spike is struck by sunlight while passed out drunk. But rather than go to the on-set medic, he pretended everything was fine and went to a hospital directly after the shooting wrapped.
Buffy's last words to Angel ("Tell me that you don't love me") are identical to the script she and Angel were forced to re-enact when possessed by the ghosts of a murder-suicide couple in I Only Have Eyes for You (1998).
Spike and Drusilla were inspired by Sid Vicious and his girlfriend Nancy Spungen. Spike sings along to the Gary Oldman cover of "My Way" by Sex Pistols at the end.
The title has been cited on listings, books, and DVD covers and menus variously as "Lovers Walk", "Lover's Walk", and "Lovers' Walk". However, the introduction to Rhonda Wilcox's "Why Buffy Matters: The Art of Buffy the Vampire Slayer" says, "The script apparently does not carry an apostrophe, making for a short, sad, declarative sentence for a title." Therefore, the title "Lovers Walk" seems the most definitive.
The set outside the magic store is the same set they used for the entrance and outside of the later magic store of Giles and Anya.