Abigail Hobbs was also the name of one of the women killed during the Salem witch trials in 17th-century New England.
Eldon Stammets is named for Paul Stamets, an American mycologist, author and advocate of bioremediation and medicinal fungi.
Amuse-Bouche is of French origin. It is single bite sized hors d'oeuvre. It does not appear on a menu for order, rather, is given gratis by the chef of his/her own selection.
Chelan Simmons, who played Gretchen Speck, played a character by the same name in Wonderfalls (2004), which was also created by Bryan Fuller and also starred Caroline Dhavernas. Her comment about 'losing the hyphen and keeping the ring' is a throwback to her parting words on Wonderfalls.
First appearance of Freddie Lounds in the series. This character was originally a man (in the novel, and both film adaptations, Manhunter and Red Dragon).