In one scene of "A Trip to the Dentist", Weevil (Francis Capra) accuses Logan (Jason Dohring) of having hit Lilly during their relationship. The series' writers were planning to develop that plot strand into a storyline, with it eventually being revealed that Duncan had hit Lilly in an epileptic fit. However, the storyline was abandoned in order to make time for other story arcs. Thomas commented, "At the end of the day, I don't want people thinking that Logan hit Lilly. I did, however, want Weevil to believe it." Although Veronica concludes in this episode that she had consensual sex with Duncan while they were both under the influence of roofies, more information about the night is later revealed in the show's second-season finale, "Not Pictured", in which it is revealed that Cassidy "Beaver" Casablancas raped her. When asked whether the writers knew that Beaver would be eventually revealed as the rapist when writing "A Trip to the Dentist", Thomas responded, "I wish I could claim that we were that clever." The writers realized that there was a moment in the episode's script where Beaver could have raped Veronica roughly a month after its airing.