Celebrity Voice Actor: American Idol veteran Blake Lewis as Kasuka Heiwajima. Later subverted when he got replaced in x2 by Vic Mignogna, due to possibly announcing the role in Shou!! before Aniplex made the announcement officially.
Cross-Dressing Voices: Played straight in the English dub of the second season where Neko is voiced by Kira Buckland, but averted in the original Japanese version where he is voiced by Ayumu Murase.
Late Export for You: The light novels began publication in 2004, but wouldn't be available in English until Yen Press licensed them in 2015.
Isaac Dian and Miria Harvent from Baccano! make a cameo appearance, but were both voiced by Sam Riegel and Jennie Kwan instead of J. Michael Tatum and Caitlin Glass. This was because Baccano was dubbed in Funimation, located in Dallas, whereas Durarara was dubbed in Bang Zoom! Entertainment, located in Los Angelesnote Oddly enough, Glass did some of the ADR Script for the anime's second season (and both she and also Tatum have worked in LA-based dubs after Durarara).
The irritable and agressive Shizuo Heiwajima is played by Daisuke Ono, who was mostly known for playing smooth-talking Bishounen such as Itsuki Koizumi (The Melancholy of Haruhi Suzumiya) and Sebastian Michaelis (Black Butler) at the time the anime first aired.
Series Hiatus: The sequel light novel series, Durarara!! SH hasn't released anything since Volume 4 in February 2016 due to Narita's recurring health problems.
Star-Making Role: For Bryce Papenbrook, who had largely been cast as secondary characters prior to getting the part of Kida. This show arguably kickstarted the trend of him landing a large portion of the leading young male roles in high-profile California anime and video game dubs (a trend that lasted at least four years). note For reference, the dub of the first season came out in 2011. Also for Brianna Knickerbocker, being one of the first anime roles she did as Akane Awakusu and Kyle McCarley with Aoba being the first big role he's done.
Technology Marches On: The original novel series and its subsequent adaptations were written in the 2000s and show a technology level to match, with everyone using flip phones and chat rooms to talk with each other. The sequel series SH was written in the 2010s and acknowledges those forms of communication have been made outdated with the advent of smartphones and social media, with characters like Kuon explicitly dismissing chat rooms in favor of social media and the chat room interstitials being replaced with clickbait articles, its comment sections, and random tweets.
Celty's kitty-ear helmet was originally just a joke by Narita, but the character designer liked it too much to not keep it.
The title is this. When asked by his editor for a title, the auhor had none in mind and spouted a few random syllables.
What Could Have Been: Narita lists two potential plots he had for Durarara!! SH volume 4 in his afterword for volume 3: Anri finds a mysterious box that Kuon buys to resell, but soon discovers that several other people want it or Yahiro is enlisted for a juvenile mixed martial arts tournament at the local dojo. Volume 4 goes with the former, leaving the other plot as merely a potential idea for a future unwritten novel.
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