The Knife and Fork, the Atlantic City restaurant where Eddie (Anthony Laciura) takes Ralph Capone (Domenick Lombardozzi) to eat, is still standing.
The Garvey that Narcisse (Jeffrey Wright) refers to is black nationalist Marcus Garvey (1887-1940), whose provocative teachings caused him to be eventually jailed and deported.
The book title that Eli (Shea Whigham) mispronounces as "Tess of de Erbiless" is actually the classic "Tess of the D'Urbervilles" published in 1891 by English author Thomas Hardy (1940-1928).
Christiane Seidel (Sigrid Mueller) & Erik LaRay Harvey (Dunn Purnsley) also worked together on three episodes of Godless (2017) as Martha & Elias respectively.