The character of Count Olaf has a distinguishing tattoo of an eye on his ankle. In 2018, while a guest on the National Public Radio quiz show "Wait Wait...Don't Tell Me!," Neil Patrick Harris said that during the first season of the show, the makeup artists had to apply and reapply a temporary version of the tattoo, but between the first and second seasons of the show, he actually got a real version of the tattoo--so whenever Count Olaf's tattoo is visible during season 2, that is Harris's actual tattoo.
The names underlined in the newspaper during the opening theme sequence are all anagrams for "Count Olaf."
Many lines of dialogue are taken, word for word, from the books.
Seasons 2 and 3 were shot together to take advantage of the three young leads not growing too much when the show's story doesn't cover a long amount of time.
Neil Patrick Harris described the series as "a much darker take on the material than has been seen before."
Barry Sonnenfeld: as Ike, Aunt Josephine's lover in the old photograph of the VFD at Lucky Smells Lumber Mill.